Do not use glass jars for storage

[ezdays]

In the case of solvents that have to go into glass jars ezdays if the top wont budge hold it upside down in warm water it breaks the seal on the jar making it easier to open.

Yep, that works most of the time, but I've had times where I've had to punch holes in the lid because there was just too much paint holding it tight. We did screen printing and pouring a good quantity of the paint back in the jar wasn't always the neatest procedure. Jam and jelly jars with quarter-turn lids worked best, but even they can get stuck shut if you're sloppy. Plastic jars are neat, sometimes you can squeeze the jar and loosen the lid that way, try that with glass. hock: