Shari said:Thanks, T. I was trying to remember what the countertops were in my old chemistry class in h.s. Those tops were indestructible - must have been granite.
Generally, the tables in science rooms were some kind of epoxy resin. They had the resistance to chemicals, and were impact resistant. If only schools got rid of them more often than once every 2 or 3 decades, there would be more in circulation for folks to find/use.Shari said:Thanks, T. I was trying to remember what the countertops were in my old chemistry class in h.s. Those tops were indestructible - must have been granite.
ironpony said:... the granite will act like a heat sink
pulling the heat out of what you are trying to solder
so if you were making stained glass, laying flat
it might not be a good idea
In NYC the chemistry tables were soap stone.Thistle said:Shari said:Thanks, T. I was trying to remember what the countertops were in my old chemistry class in h.s. Those tops were indestructible - must have been granite.
Most of the ones I seen were slate,its a different composition compared to marble/granite/limestone etc.But its acid resistant & fireproof same as granite.I took one of my smaller salvaged scrap pieces of 3/8" Penn slate from old school chalkboard & made a 'baker's peel'.
Great for sliding the occasional pizza or foccacia bread in/outta the oven.
homebrewz said:Granite is by far much harder than marble. On the hardness scale marble (which is essentially metamorphosed limestone) is around 3 to 4, where granite is somewhere around 7. Also, marble is a carbonate (base) so it reacts with acids. As someone mentioned above it is easily etched, even by dilute acids.
My college chemistry professor said the lab bench tops were coated with lanolin. I think they were probably slate or a similar material.
If you want a good pizza stone, go to your local pottery supply shop and pick up a kiln shelf for your size oven. They're just like the ones in cooking stores, but half as much and usually more durable.
We use essential cookies to make this site work, and optional cookies to enhance your experience.