Time for crafting alchemical items?

[Matrota]

I plan to play an alchemy based character soon, and I'm trying to figure out how long it takes to craft an item. Assuming I can take a ten and pass the check, how long would it take to craft alchemist's fire? A firestone? Is there a system for this?

[Gildedragon]

It's under the craft skill.
Short version:
Get the cost of the item in silver pieces (10sp to the gp)
Multiply your check result by the craft DC; this is how much you advanced in a week.
Subtract the DC*Check result from the item cost in silver.
Repeat once per week until you've created the item.

Per day progress is also possible: as above but the cost is in Copper Pieces instead of Silver Pieces (100cp to the gp).

You can craft faster by increasing the DC in increments of 10

You can also instacraft stuff with access to Fabricate