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 Dental Alginate for casting molds?
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TC
Engine Wiper

Posted - 09/13/2018 :  9:40:29 PM  Show Profile  Reply with Quote
If you’ve ever had a dental crown done or some other work that required an impression and casting be made of your teeth, you’ve perhaps experienced a dentist or assistant using a substance called “dental alginate” to make that mold for the casting/impression of your teeth.

So I’m curious, has anyone used this material to make model castings, and if so, what were your results? I just came into a decent sized can of the powdered mixture, which can be mixed up into smaller or larger amounts as needed. I’d like to hear what experiences, tips or tricks might be known about how to use the stuff for modeling purposes...

Country: USA | Posts: 192

k9wrangler
Engineer



Posted - 09/13/2018 :  11:04:31 PM  Show Profile  Reply with Quote
When I was trained as an evidence technician aka CSI Tech we used a flexible dental product was used for making impressions to make tool mark impressions at burglary scenes. It was a two part product that firmed into a flexible ‘negative’ image. We’d then use plaster of Paris/hydrocal type product to make an image of a toolmark.

The product we used was in a tube if I recall, quite large, and a brown color. The second part was mixed to start the reaction. It had a mild odor but one that stuck in your nose for some time. Further looking I found it Coe-Flex. T’ain’t cheap.

I looked for the dental alginate online. It does appear to be used in a similar manner but different in constitution than the product i described. That training was circa 1980.


Karl Scribner
HMFWBIC
Kentucky Southern Railway
and associated lines
Midwest Lower Michigan

Edited by - k9wrangler on 09/13/2018 11:13:26 PM

Country: USA | Posts: 9647 Go to Top of Page

TC
Engine Wiper

Posted - 09/13/2018 :  11:11:04 PM  Show Profile  Reply with Quote
Interesting. The canister I have here is Jeltrate Plus- Dustless, and is marked “fast set” on the canister. Made by Dentsuply International.

I suppose the only way I’ll find out how it works for sure is to get out the Legos, build a casting box, and mix a batch of this stuff up...



Edited by - TC on 09/13/2018 11:12:16 PM

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k9wrangler
Engineer



Posted - 09/13/2018 :  11:16:09 PM  Show Profile  Reply with Quote
Let us know. I see dental alginate for less than the Coe-flex.

Interesting stuff document and photograph your results.


Karl Scribner
HMFWBIC
Kentucky Southern Railway
and associated lines
Midwest Lower Michigan

Country: USA | Posts: 9647 Go to Top of Page

railmus
Fireman



Posted - 09/14/2018 :  10:57:08 AM  Show Profile  Visit railmus's Homepage  Reply with Quote
If I am not mistaken, the mold deteriorates quite quickly so you may not be able to make many castings.


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k9wrangler
Engineer



Posted - 09/14/2018 :  11:01:52 AM  Show Profile  Reply with Quote
quote:
Originally posted by railmus

If I am not mistaken, the mold deteriorates quite quickly so you may not be able to make many castings.

Logical in that it is basically designed for a one time use.



Karl Scribner
HMFWBIC
Kentucky Southern Railway
and associated lines
Midwest Lower Michigan

Country: USA | Posts: 9647 Go to Top of Page

Pennman
Fireman

Premium Member


Posted - 09/22/2018 :  5:27:05 PM  Show Profile  Reply with Quote
TC

How about uploading a picture of the can to show us what it is?
Or, ask Louis, he is our walking and talking encyclopedia!

Rich



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NE Brownstone
Crew Chief



Posted - 09/22/2018 :  8:27:40 PM  Show Profile  Visit NE Brownstone's Homepage  Reply with Quote
Alginate is a one time use impression material. Its made from alge and must be kept moist up until use. Its good for making a master pattern that you would use to make a production silicon mold.

Smoothon sells a non dental alginate for making body art repros.
https://www.smooth-on.com/product-line/alja-safe/



Edited by - NE Brownstone on 09/22/2018 8:41:43 PM

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deemery
Fireman

Premium Member


Posted - 09/23/2018 :  10:09:34 AM  Show Profile  Reply with Quote
I was waiting for Russ to explain it to us, since this is his day job :-)

dave


Modeling 1890s (because the voices in my head told me to)

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TRAINS1941
Engineer

Premium Member


Posted - 09/23/2018 :  11:02:43 AM  Show Profile  Reply with Quote
quote:
Originally posted by deemery

I was waiting for Russ to explain it to us, since this is his day job :-)

dave



Your right the tooth fairy in disguise of building stone walls!!


Jerry

"And in the end, it’s not the years in your life that count. It's the life in your years." A. Lincoln

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Mousecounter
Section Hand

Posted - 09/28/2018 :  7:31:07 PM  Show Profile  Reply with Quote
I've seen this used in a quality inspection department to take a casting of something we couldn't measure directly, and then we measured the casting. All I can say is it was dental quality molding material. As I recall, we found it to be accurate to around a couple of tenth thousandths of an inch.



Bill R.
CEO Costa Palenti RR
"Some say, 'Coasta', most say 'Cost ah'."

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Bernd
Fireman



Posted - 09/29/2018 :  08:29:56 AM  Show Profile  Visit Bernd's Homepage  Reply with Quote
Here's a guy on E-bay that sells all sorts of dental plaster. Haven't used his product, but was looking at other materials to do castings. Plus I have two kit's that require dental plaster to fix some of the casting that are broken. Just never got around to do it.

https://www.ebay.com/str/Plaster-Supplier?_trksid=p2047675.l2563

Bernd


A PESSIMIST sees a dark tunnel
An OPTIMIST sees light at the end of the tunnel
A REALIST sees a freight train
The LOCOMOTIVE ENGINEER sees three idiots standing on the tracks

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