If they are glazed, you can write on them, but it will wipe off fairly easily.
There is a Glazed roof tile roll forming for ceramic swimming pool.
The advantages are the it comes in a huge variety of looks and most ceramic tiles are very inexpensive and easily available, glazed ceramic tile also does not stain. The disadvantage is that ceramic tile can crack if hit with a heavy item.
A high fired clay pot is waterproof and a glazed pot is waterproof and both are safe for this purpose.
Basic dish soap and water works quite well. If the pot is unglazed (that is the standard brown flower pots) scrub with a scrub brush to remove the residue and let air dry. If you are concerned about bacteria, you can place a dry pot in the oven at 200 degrees to sterilize them. Leave about 20 minutes. DO NOT sterilize a glazed pot with this method. Use the standard bleach rinse to sterilize them.
I have a glazed ceramic pot in the garden that has a hard white lumps appearing on it , it may be coming from inside . I have tried removing it with heavy duty cleaners but no success. Any ideas?
If they are glazed, you can write on them, but it will wipe off fairly easily.
There is a Glazed roof tile roll forming for ceramic swimming pool.
enamel
A Bennington is a distinctive type of glazed ceramic marble, or a work in such a form.
RAMEKIN
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Ramekin
Porcelain is not transparent. It is a ceramic material that is typically opaque and can be glazed for a glossy finish.
The advantages are the it comes in a huge variety of looks and most ceramic tiles are very inexpensive and easily available, glazed ceramic tile also does not stain. The disadvantage is that ceramic tile can crack if hit with a heavy item.
An albarello is a ceramic pharmacy or drug jar, typically made of majolica, a form of glazed Italian earthenware.
To make a flower pot, one will need to make some concrete. One will need to use a mold in order to make the correct ceramic pot shape, and allow the pot to set for at least 24 hours.