to not to exceed high tepareture, so that the instrument cannot damage during process
The Star of David on Royal Rudolstadt Prussian porcelain is a maker's mark if it is not the bottom of the piece. A Star of David on the side of the piece means that it was a piece used during a Jewish holiday.
In comparable crockery, a porcelain piece would be lighter than a piece of stoneware. This is because porcelain items are usually made thinner than stoneware.
Hit a rodent with a piece of porcelain will usually kill it. Not sure you have the right term in porcelain.
2.3lbs
A streak plate
The color of the powder that a mineral leaves on a piece of white unglazed porcelain is called the "streak." This is a helpful characteristic used in mineral identification.
It's called a streak plate.
The flower mark on Royal Rudolstadt porcelain usually indicates the age and origin of the piece. It can help identify the specific manufacturer or time period when the porcelain was made. Royal Rudolstadt is known for its quality and craftsmanship in porcelain production.
Porcelain is a very fine and delicate clay body and as such is more likely to chip than stoneware which contains grog, a pre fired clay, that strengthens the piece.
Heating steel detempers it, it makes it softer.
on the paper!!!!!
By rubbing a mineral against a piece of unglazed porcelain tile From Prentice Hall textbook: Inside Earth