Is it safe to use for dental impressions for forensic analysis in a high school lab?

I do not believe that this product is a dental grade alginate which is what you will need. Try this http://www.amazon.com/Hollywood-Impressions-Molding-Powder-Alginate/dp/B000KI6W5Y/ref=sr_1_1?ie=UTF8&qid=1398300899&sr=8-1&keywords=dental+impression+kit

How many whole adult hand casts could you make with one box?

Most probably three or four possibly more, depending upon how closely the casting container is made and how far up the arm the casting is to be made. You have to be a bit careful of having the alginate too thin particularly at the edges where you transition from the casting to air. it can and will tear if it is too thin. You might be able to make a dozen or so casting if you simply paint the alginate onto The hand and then reinforce the cast with plaster of paris. I've heard of this method, but, have not tried it.

I want to make a mold of 16 different 4 year old's hands. How much of this stuff will I need if I'm using 1/2 gallon containers for each one?

Well if your using 1/2 gallon containers. Your mixture rate is 1:1 . that is 1 cup alja safe 1 cup water. So you need to probably use for each cast 3 to 4 cups alja safe and 3 to 4 cups water. 16 casts you would probably need about 9 pounds of alja safe.

How much heat alija safe can tolerate when casting?

If casting material reaches the boiling point of water, the moisture in the Alja Safe will convert to steam, causing bubbles in your casting.

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1 X Alja-Safe Alginate 3-lb Box by Smooth-On, Inc.

Product ID: 52335606

Details

Brand
Smooth-On
Item form
Powder
Material
Plaster
Special feature
Non Toxic
Specific uses for product
Casting

⏳8 min pot life

🕒10 min demold time

🛡️Crystalline-silica free & skin safe

CLP 340026

Duties & taxes included

In stock

Sold byAmazon ChileDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Mold like a pro, safely and swiftly—don’t get left behind!

EFFORTLESS USE - Just add water and mix—simplicity meets professional-grade results.
STABLE MOLD INTEGRITY - No collapsing molds—your casts stay sharp and reliable every time.
HEALTH CONSCIOUS FORMULA - Free from carcinogenic crystalline silica for safe skin contact.
PRECISION DETAIL CAPTURE - Achieve ultra-fine mold accuracy for flawless reproductions.
FAST EFFICIENT WORKFLOW - Set and demold in under 10 minutes—perfect for tight schedules.

Smooth-On’s Alja-Safe Alginate is a 3-lb skin-safe, crystalline-silica free molding powder that sets in 8 minutes and demolds in 10. It delivers superior detail capture without mold collapse, ideal for quick, accurate body part reproductions using plaster or resin. Non-toxic and easy to use, it’s the go-to choice for professionals demanding safety and precision.

Specifications

ASIN	B000KVSU60
Brand	Smooth-On
Colour	Pink
Compatible Material	Plaster, Gypsum, Resin
Container Type	Box
Customer Reviews	4.6 4.6 out of 5 stars (1,150)
Full Cure Time	8 Minutes
Item Form	Powder
Item Package Quantity	1
Item Volume	3 Litres
Item Weight	1.36 kg
Manufacturer	Smooth-On, Inc
Manufacturer Part Number	75163586060
Material	Plaster
Model Number	SOaljasafe3lb
Number of Pieces	1
Other Special Features of the Product	Non Toxic
Specific Uses For Product	Casting
UPC	751635296602 751635837621
Unit Count	1360.7771 gram
Viscosity Level	Low to Medium
Water Resistance Level	Not Water Resistant

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