Friday, October 24, 2014

HotSmartUSA - Home

HotSmartUSA - Home

Click the image above to buy the only plates in the world that keep food hot! 
They have a special heater inside (below)

Hotsmart® plates were originally developed as gourmet plates; the designer was actually trying to design a tortilla warmer that really keeps tortillas warm and developed a very effective microwaveable heat storing device,; so effective that actually decided to patent it. At the same time he realized that that while tortillas are consumed in many places, the plate is globally used, so priorities changed (it turned out that HotSmart® plates are excellent tortilla warmers (better than anyones on the market today).

When HotSmart® plates hit the market through They were immediately discovered by home caregivers that take care of their elder loved ones and Alzheimers patients, the sick WLS, ALS AND  many other people who has to or likes to eat slowly.

Thursday, October 2, 2014

Thermal Plates

Thermal Plates
When you call something "thermal" what comes to mind? To me styrofoam,  jackets with lots of insulation, thick socks, "tortilla warmers" which do not warm anything since they do not have a source of heat the term was developed no doubt by marketers. Current "tortilla warmers" are only inefficient insulators (HotSmart Plates are real tortilla warmers).

Marketers are experts in conveying an idea even if the idea is false or the product is hazardous to your health. Just watch "madmen" the series -which is  good as entertainment by the way- to see many examples of dishonest marketing .By the way: Is there such a thing as honest marketing?

Politics (Oops!)
Politics is marketing, whoever spend more money on advertising usually wins and that's why some from both parties spend lots of time in fund raising (How did I get into this mess?).

HotSmart Plates are Thermal Plates
(but use a better technology than insulation)
OK, we did not want to call HotSmart Plates "thermal" plates because that normally conveys the idea of insulation; HotSmarts are based on a different, simple but very efficient technology Storing lots of microwave energy in a very short period of time and releasing it over an extended period of time  at a rather controlled rate  (taking advantage of the Stefan-Boltzmann law and other laws of thermodynamics).

Call them thermal plates but remember...
(We have always called them Heat Retentive Plates)
So, you can call HotSmart Plates "thermal plates" if you wish (since they deal with thermal energy and thermodynamics)  but they are not insulated plates, after all: How can you insulate both sides of a ceramics plate? And even if you could, how can you insulate the food? The food has moisture that  evaporates, which in physics is called a change of phase, this change of phase "steals" heat from the food and renders it cold and bland.

HotSmarts keep adding heat to food
What we need is to keep adding  heat to the food to compensate for heat losses but without overheating or overcooking the food. HotSmart Plates do all of this because they have a delay action engineered in the design and despite the fact that they get HOT, they can be easily and safely handled with the bare hands. The rim does not get hotthey are SMART plates Our brand name
HotSmart® is not a coincidence.

Temperature has an effect on flavor and restaurant owners know it (Google it if you wish)

"Beer is bitter and ice cream is sweeter when hot... and food tastes better on a HotSmart"
 (We are disrupting the market and competitors get mad, pay no attention to lies).

These Gourmet hot plates are also used by the elderly, Alzheimer's patients, the sickand people with special needs and disabilities of all kinds. In general by people who have to eat slowly or simply to enjoy hot food.



Tuesday, August 26, 2014


This is how our improved model looks:


We love this comment (below):

On the contrary, thanks to you! for taking the time to write 
(As the inventor I'm really grateful) 

Developed as a gourmet plate, it was soon discovered by many people with special needs and now it is widely used by people with pre-diabetes and diabetes (eating slowly helps prevent overeating, obesity and all nasty things related to obesity) and HotSmarts  keep food hot). used also by home caregivers for their elderly loved ones (an 86 year old mother said: "best present ever"), 

Also widely used by people who had WLS (weight loss surgery), the sick, people with Alzheimer's, stroke survivors,(I, the inventor survived a stroke and a brain tumor myself).

Enfin -as the Frech would say- any person that really likes to enjoy hot food or who for any reason likes to or has to eat slowly, now there are HotSmarts to keep their food hot.

Please see Frequent asked questions and RT for others!  
Click picture below to see an interactive explanatory image

HotSmarts are real "Heat Retentive Plates" the others stay hot for only 5 minutes, not 30 + as a HotSmart


Friday, July 25, 2014

HotSmartUSA - Home

HotSmartUSA - Home

Heat Retentive Plates

NOT MASS PRODUCED BUT AVAILABLE . Ideal for caregiving Alzheimer's patients, the elderly, the sick, people with mobility problems and in general all special needs people.
To buy click

Available at 




Monday, June 2, 2014


Ideal for caregiving too! Yes, although designed as a "Gourmet plate" it was soon discovered and used widely by caregivers.

#HotSmart Plates enhance all recipes, you can #EatSlowly to enjoy AND prevent #Overeating U know what it means?:

OK, Let me repeat: Eating slowly helps prevent overeating (Google it yourself). Do you know what this means? It may help prevent obesity. Click Harvard on eating slowly

There is much more to it than that but we want to keep it simple for now 

IMPORTANT: If you want to learn how to manufacture them see previous posts. We can teach you! (Patented, license required for the USA) 

To order:


Saturday, March 1, 2014


Heat Retentive Plates (HotSmart Plates) Allow you to eat slowly which helps prevent overeating; please Google "eating slowly" so you understant why and by all means read Harvard on eating slowly  

Heat Retentive Plates are also Ideal for the elderly, Alzheimer's patients, the sick and in general for all special needs people who eat slowly. They have been called "A blessing", "A God's send", "Best present ever" said the 80 year old mother of one of our customers.

Initially developed as gourmet plates,  things evolved. The inventor is a stroke and brain tumor survivor who started designing a tortilla warmer and decided a plate would have a larger market; he ended up with the best care giving plate in the world and we use it as tortilla warmer too. (We claim it is also the best tortilla warmer in the world)

HotSmart Plates are the ONLY patented HEAT RETENTIVE PLATES on the market; they use the Stefan-Boltzmann principle and patented technologyWhat does this mean? The sketch below helps explain everything.
See also  

For how to manufacture HotSmarts you need to see previous posts on this blog, and patents are public domain (License required for the USA).

It is a great steak plate too and please allow me to repeat: Ideal for caregiving  (Alzheimer's, Parkinsons patients, special needs, the elderly,  WLS patients,etc.); baby boomers love them.

This is how it works

(it is basically an energy trap)

Although not mass produced yet; it is available at click here 

  • HotSmart Plates use a core of a specially developed -proprietary- microwave absorbing material
  • This core is enclosed in a cavity in the plate
  • The upper and lower components are basically transparent to microwave radiation
  • The core gets very hot and radiates in the infrared range of frequencies (heat)
  • The Stefan-Boltzmann law regulates this radiation
  • Both Microwaves and infrared radiation are electromagnetic radiation (Only different wave length)
  • HotSmart Plates need only ONE minute microwaving (1200W) and stay hot for over 30+ minutes  (over half hour) Believe it or not!
  • There is a big difference between a simple thick, heavy plate and a HotSmart Heat Retentive Plate.  
  • See also:
  •  A ceramic plate with a heater     
  •  How to keep food hot on the plate 
  • Prevent obesity by eating slowly   

Saturday, December 7, 2013


A ceramic plate with a heater inside to keep food hot

Click the link above to see all about it!
 It looks like a regular plate but it has a heater inside...

A HotSmart used for a simple breakfast at home; it makes a big difference!
(The HotSmart Mug keeps coffee hot to the last sip)

By the way, the mug also has an integrated heater; the plates are excellent for steak, even better than skillets on a wooden base

Yes, from eggs over easy to steak and pasta and Chinese food
and... You name it!



Saturday, November 30, 2013


HotSmart sells the ONLY plates IN THE WORLD that keep food hot at the table

HotSmart plates are obviously excellent for caregiving (Alzheimer's patients, special needs people, the sick and the elderly)  


11-26 ctt plates
Published on November 26th, 2013 | Edited by: Jim Destefani

Engineered plates, mugs keep foods, beverages hot

Published on November 26th, 2013 | Edited by: Jim Destefani

 ctt 11-26 plates HALF PLATE WITH SLANTED JOINT 110713[2] copy
Cross section through HotSmart plate shows core of microwave susceptor material and joint design. (Credit: J.J. Ramirez/HotSmart USA.)

As the US heads toward the Thanksgiving holiday, it seems appropriate to explore ways to keep our food warmer, longer. After all, the traditional Thanksgiving feast of turkey and all the trimmings has become the centerpiece of the day for many. (Along with, in many households, football.)

Enter Juan J. Ramirez. A former industrial engineer, Ramirez invented and patented a unique stay-hot dinnerware technology after losing his long-time job and suffering some health issues. “The idea came after I suffered a stroke and brain tumor surgery,” he explains in an email. “Well, the idea did not come because of the stroke, but because I lost my career of many years in manufacturing and I found myself unemployed and with lots of time available.”

Ramirez used that time to develop a line of dinnerware that, after only a minute in the microwave oven, will keep food in the center of the plate hot for more than 30 minutes. The rim of the plate, meanwhile, remains cool to the touch to minimize the chance of accidental burns.

Ramirez says HotSmart plates can be made using practically any ceramic material, from whiteware to bone china, and that “anybody making plates” would know the details of firing time and temperature. The trick is in the plates’ core of susceptor material, which absorbs microwave radiation and then releases the heat in a controlled manner. “It was about time the ceramic plate learned a few new tricks,” he jokes in the email, while the product’s website calls the patented technology “the only functional change to the ceramic plate in centuries.”

According to Ramirez, the microwave susceptor material is red earthenware with an addition of iron filings. “Red earthenware already contains iron oxide, which is a polar molecule,” he explains. The material absorbs microwave radiation, then releases it as heat in a controlled manner according to the Stefan-Boltzmann law, the product website says. (The photo above, credit J.J. Ramirez/HotSmart USA, shows the susceptor material and the top and bottom halves of a plate.)

Plate tops and bottoms are produced separately, then joined using an unspecified adhesive with the susceptor material sandwiched inside. According to Ramirez, any shrinkage or warpage that might result from firing is addressed by the plates’ design, which uses a conical joint. The product website says the design has proved durable in months of cycling between microwave and dishwasher.

Although they are not yet being mass produced, the plates and mugs are being marketed on Amazon. Ramirez says the products have “been received very well.” The plates have also been featured as a “Reader Invention of the Month” in Popular Science magazine.

According to the website, the dinnerware’s ability to keep food hot for extended periods of time may even offer health benefits for diabetics, bariatric surgery patients who must eat slowly, people trying to lose weight, and others who simply want to practice “mindful eating,”  a way to reduce overeating that makes a practice of slow, deliberate dining. The website also calls HotSmart plates “the most hygienic plate in history,” because they lack the unglazed dry foot found in most dinnerware that “can absorb moisture and become a breeding ground for bacteria.”

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  1. Your comment is awaiting moderation.

    Main features of a HotSmart Plate:
    - Needs only ONE minute preheating in the microwave oven
    - Remains still hot after 1/2 hour (Yes, over 30 minutes)
    - Safe handling with the bare hands while hot (the rim does not get hot)
    - Delay action keeps plate from over-heating or over-cooking the food
    - The plate is green; no toxic materials used


Saturday, November 9, 2013

Alternate HotSmart Plate Joint (Seal)

HotSmart Manufacturing - Alternate Slanted Joint

(See previous posts and learn how to manufacture them)
This is a conical joint (alternate configuration) for ease of manufacturing
See previous posts to learn how to manufacture HotSmart Plates (Patented, license required); the ONLY ceramic plates in the world that keep food hot

Anybody that knows about manufacturing and tolerances (as well as firing ceramics in a kiln) can tell you the advantages of this design


Alternate Slanted Joint
(The heater is not shown)

Will you please RT? Many people don't know that in 2013 there are plates that keep food hot.

HotSmarts stay hot for over half hour, however, they are safe to handle
(The green zone, the rim does not get hot

An excellent present for elder parents
(An old lady told his son: "This is my best present ever")


Wednesday, September 18, 2013

HotSmart Manufacturing Instructions - Sealing options

Did I tell you HotSmart Plates are ideal for mindful eating?


This is another option to seal HotSmart Plates; I'm sure there are many more available, all it takes is some browsing the internet and a few phone calls.






  • 2 HOURS @  100 C + 2 HOURS @ 175 C;

  • 8 HOURS @ 150 C  (I recommend this cure schedule)

Other alternatives? See:

(Other alternatives may be available in your country)




Saturday, September 7, 2013

HotSmart Manufacturing - The adhesive sealers

Adhesive Sealers first option

Below a photograph of the sealers we have been using and they are the ingredients needed to make RF.5 which was developed in house.

The silicone creates a good double wedged or hourglass shaped seal while the RF.5 is used on the outer seal (It has a very nice appearance if you remove the excess thoroughly.
(Under construction)

Silicone RTV and AB glue
(Available in China)

Monday, August 26, 2013

HotSmart Manufacturing Instructions - Joint

Lets continue with the Manufacturing instructions

The Joint

(We welcome questions and may even buy part of your production for the USA market)

You may be asking yourself why HotSmart is so "kind" as to publish this? (What's the catch?)
  • First of all, patents are public knowledge anyway; just search the USPTO for Pat. 7,176, 426
  • Second we want the world to know that they don't have to eat on cold dumb plates (that get food cold) anymore. All regular plates even if preheated get cold fast.
  • IMPORTANT: In a world with obesity problems, eating slowly helps prevent overeating. Google "eating slowly yourself or you won't believe me  obesity, heart disease, diabetes, etc. (And who wants to eat slowly if food gets cold?)
  • HotSmart is looking for suppliers of different styles, shapes, patterns, materials etc.
  • HotSmart is looking for funding to grow fast; our prices are very high because we are not mass producing and even with those ridiculous high prices, we seriously doubt there will be HotSmarts for this coming Christmas of 2013. 

Adhesive sealers (alternatives)
This is just the first alternative: using Silicone RTV  and RF.5 to seal the plate which may be used in combination with RF.5 (This is what I recommend unless you have access to hi-tec epoxies which I will mention in a separate post).

(RTV is available in different colors and some companies are willing to develop the color you need).

There are many other alternatives including one that HotSmart (Myself) Developed that has nice appearance (I will talk about it on the next posts) let me advance you this:
While testing some type of Chinese A B Epoxy which has the tendency to "vitrify" and crack I thought: what if I add silicone to the mix so that the polymer interlaces with the epoxy and it does not get so hard? Well believe it or not at the second try I obtained what I call RF.5  (Ramirez Formula 0.5). It came with the right hardness and color for my HotSmart plates
  • Component A................ 2 parts
  • Component B................ 1 part
  • Clear silicone RTV........0.5 parts

Clear silicone RTV which is flexible is better for the hourglass (Double wedge) shaped seal while RF.5  may be used for appearance.

Steps for assembly:
  1. With the plate upside down, you cover all the small round area - including the boss with clear silicone RTV;  place the heater with the concave side facing the plate, fill the hole in the heater with RTV.
  2. Wait till the RTV cures (It takes several hours) DO NOT SEAL THE PLATE BEFORE IT CURES
  3.  Apply clear RTV  on the plate at the place you will form the hourglass-shaped seal
  4. Apply RF.5 to the flat surface of the base to form the exterior seal and remove the excess before it hardens completely. You want a perfect seal without excess of adhesive.
  5. That's it; make 3 components (you can even outsource them), and put them together. 
License required for the USA
(Get in touch)

Another alternative is using High temperature epoxy which requires some curing time in an oven but becomes practically indestructible (I will give details later).

Obviously the plate can be "slimmer" and lighter

(This is an illustrative example)

 The joint has an hour glass shape so that the pressure from either side increases the efficacy of the seal. This technique is used in bathyscaphe windows (check Wikipedia). The explanation is simple: In a conical or wedge shaped seal the more you push the better it seals; I did not invent that.

Under construction... I will update as soon as I can 

Please RT to help us lower the price    


Click the image AND the link below for more info

Did you understand what an hourglass figure is?

Beautiful Scarlett Johansson

Please don't forget to RT!

We are open for exclusive licensing deals
Find the contact information at