Alchemy

Players who have gathered various ingredients found in the Neptaverse may want to use recipes or knowledge to turn them into something more. This is known as Alchemy. Alchemy is used to craft items like potions and poisons from ingredients like plants or seeds. This action can occur during downtime if the party is out is somewhere safe to perform this ritual, or it can occur in the middle of the game as the party finds themselves with a suitable time and place for some 'science'.

The contents of Alchemist's Supplies include two glass beakers, a metal frame to hold a beaker in place over an open flame, a glass stirring rod, a small mortar and pestle, and a pouch of common alchemical ingredients including salt, distilled alcohol, powdered iron, and purified water.
  If the player has found themselves in a suitable place to support this, in possession of a recipe and a combination of ingredients that can be refined into something, they can make an Alchemy attempt, which are equivalent to Rituals.

When a player would like to craft a potion, poison or other solution, they would announce it to their DM. This process takes a specified amount of time depending on the recipe. A succesful Alchemy attempt results in a single vial(dose) of paste, powder, or liquid.
  Recipes can be found on the Alchemy Chart.
Alchemy check = DC of 10 + DC Difficulty of the recipe
Alchemy Modifier = WIS or INT Modifier (+ Proficiency Bonus if using Alchemist Supplies you’re proficient with).

If the roll is successful the Alchemy attempt is a success and 1 vial(dose) or equivalent is made.
To process more ingredients it would take the same ritual process.

Using a Recipe

Unless you are an Alchemist or have the Potion Maker or Poisoner feat you will need a recipe to craft a potion or poison.  

Types of Recipes

Potion, Poison, Acid, Solution  

Recipe Difficulty

Easy = + 5
Medium = + 8
Difficult = + 10
Very Difficult = + 15
 

Skill Checks

If you have proficiency in alchemist's supplies, you can use your tool proficiency to give yourself advantage on certain skill checks.
  Arcana
Proficiency with alchemist's supplies allows you to unlock more information on Arcana checks involving potions and similar materials.
  Investigation
When you inspect an area for clues, proficiency with alchemist's supplies grants additional insight into any chemicals or other substances that might have been used in the area.