Years of training and practice in your craft have refined your technique and cut your crafting time in half.

You can make 5 gold pieces worth of any of the common alchemical products in an uninterrupted four hour work period. At the end of the period, a Wisdom(Medicine) check reveals the success of the process. A check of less than 10 means that the batch is ruined. 10-14 means that only half the quantity of the product was produced. 15-19 is a success. 20 or more means that twice as much of the product was produced than expected. A roll of a natural 1 typically results in a toxic, smoking, bubbling disaster.

Common Alchemical Products: Paints, dyes, inks, stains, insect repellent, perfumes, glues, solvents, itch cream, anti-fungal cream, analgesics, laxatives, soaps, deodorant, toothpaste, teas, candy, chewing gum, acid, acid neutralizer, smoke powder, matches, sunblock and other similar products.

Potion Crafting
Unless the DM has alternate rules, use these guidelines for making potions;

A single potion of antitoxin normally takes two eight-hour work days to produce. Though, the alchemist's Quick Crafter Feature can cut this time to one day.  Magical potions require the alchemist or someone aiding the alchemist, to know the spell contained in the potion and to spend the appropriate spell slot on each day of the potion crafting.

The crafting time for you to produce magic potions is as follow; Common potions take 1 day, uncommon potions take 2 days. Rare potions take 10 days and the alchemist must be at least 5th level. Very rare potions take 100 days and the alchemist must be at least 11th. level.