docs/files/recipes/phmodifiers.md

@@ -35,7 +35,7 @@ Final form achieved after: N/A
 ###Ingredients
 
 * **Water - 1000 L**, the solvent, ideally has a PH of 7.
-* **Soda ash - 5g**, to make an alkaline solution (PH 8-PH 13)
+* **Soda ash - 5g** (sodium carbonate Na2CO3), to make an alkaline solution (PH 8-PH 13)
 * **Citric acid - g** OR: 150 ml of vinegar or lemon juice, to make an acidic solution (PH 1 -PH 6). Citric acid is sold in asian supermarkets and has very high acidity (more than vinegar and lemon juice)
 * **Red cabage dye - 50 ml** see [this recipe](https://class.textile-academy.org/2020/loes.bogers/files/recipes/cabbagedye/). Alcohol-based cabage ink is also fine. 
 * **A large round coffee filter**, ideally white ones. To make PH strips. If you can't find these, get 4 smaller filters and cut them open so you have only one layer. 
@@ -175,6 +175,7 @@ Needs further research?:  not sure
 
 **Environmental conditions**
 
+- Humidity:  40-50%
 - Outside temp:  5-11 degrees Celcius
 - Room temp:  18 – 22 degrees Celcius
 - PH tap water:  7-8

docs/files/recipes/recycledPLA.md

@@ -223,7 +223,7 @@ Recycling PLA with PET plastics contaminates the waste stream.
 
 **Environmental conditions**
 
-- Humidity:  not sure
+- Humidity:  40-50%
 - Outside temp:  5-11 degrees Celcius
 - Room temp:  18 – 22 degrees Celcius
 - PH tap water:  7-8

docs/projects/05_getting_started/tools.md → docs/files/tools.md

@@ -128,8 +128,8 @@ And finally, the hard(er) but very exciting part! You will need these tools to e
 - A gas burner (like a campinggaz or bunsen burner)
 - A lighter
 - A permanent marker (thin)
-- An inoculation loop or other metal loop
-- 2x heat proof glass bottle with screw cap, 500 ml
+- An inoculation loop or any other metal wire formed as a loop
+- 2x [heat proof glass bottle](http://www.laboratoriumglas.eu/index.php?item=labfles-500-ml-met-gl-45&action=article&group_id=56&aid=301&lang=NL) with screw cap, 500 ml
 - Optional: Autoclave tape
 - Parafilm
 - An incubator or temperature controlled box (26-30 degrees C)