diff --git a/docs/files/recipes/bacterialdye.md b/docs/files/recipes/bacterialdye.md
index f2149609c5a54b0d225ed606ca4d672928aac2a8..7c7d972069938abef682fac6d778c80fea1f16f2 100644
--- a/docs/files/recipes/bacterialdye.md
+++ b/docs/files/recipes/bacterialdye.md
@@ -258,13 +258,7 @@ Yes, by Cecilia Raspanti, Textile Lab, Waag Amsterdam, 9 March 2020
 
 ## Copyright information
 
-### This recipe is in the public domain (CC0)
-
-Not sure
-
-### This recipe was previously published by someone else
-
-Yes, this recipe was developed and documented in **Bioshades**, by Cecilia Raspanti et.al., for Textile and Clothing Business Labs (TCBL.EU) and Textile Lab Amsterdam Waag, 2016-2019, [link](https://bioshades.bio)
+This recipe was published under a [Creative Commons Attribution Share-Alike licence](https://creativecommons.org/licenses/by-sa/3.0/) as part of the project **Bioshades**, by Cecilia Raspanti et.al., Textile and Clothing Business Labs (TCBL.EU) and Textile Lab Amsterdam Waag, 2016-2019, [link](https://bioshades.bio)
 
 ##References
 
diff --git a/docs/files/recipes/phmodifiers.md b/docs/files/recipes/phmodifiers.md
index 40cd5fdec93cb76a90159a8be6d7b3e51e869f36..ca35e327e97537cf41aec0d87f908ea4b00fedba 100644
--- a/docs/files/recipes/phmodifiers.md
+++ b/docs/files/recipes/phmodifiers.md
@@ -1,13 +1,12 @@
 # PH MODIFIERS & PH PAPER
 
-##MAKE PH 2, 5, 9 and 13
-##FINAL PICS
-##EXACT MEASUREMENTS
-##PRICE
+![](../../images/finalpics-185.jpg)*PH paper and an alkaline modifier, Loes Bogers, 2020*
 
 ### Description
 
-Recipe for an alkaline (PH13) and an acidic (PH2) PH modifier to be used with natural dyes and inks (water and alcohol-based). These can change the original color to become brighter, duller, or even go all the way from purples to greens and blues. Alkaline tends to make colors "colder", while acidic dyes create warmer shades. Acidic and alkaline modifiers have an especially strong effect on dyes made of vegetables that contain anthocyanin such as red cabbage dye, hibiscus, blueberry. 
+Recipe for alkaline and acidic PH modifiers to be used with natural dyes and inks (water and alcohol-based), and PH test strips made with red cabbage dye or ink. 
+
+PH modifiers can change the original color to become brighter, duller, or even go all the way from purples to greens and blues. Alkaline tends to make colors PH sensitive natural dyes "colder", while acidic dyes create warmer shades. Acidic and alkaline modifiers have an especially strong effect on dyes made of vegetables that contain *anthocyanin* such as red cabbage, hibiscus, blueberry. 
 
 ### Physical form
 
@@ -17,7 +16,7 @@ Color without additives: Transparent colorless. Can take on some pigments if dye
 
 ### Fabrication time
 
-Preparation time: 10 minutes
+Preparation time: 30 minutes
 
 Processing time: N/A
 
@@ -27,25 +26,28 @@ Final form achieved after: N/A
 
 ## Ingredients
 
-* **Water - 800 ml**, the solvent, ideally has a PH of 7.
-* **Soda ash - up to 50 g**, to make an alkaline solution (PH 8-PH 13)
-* **Citric acid - up to 50g** OR: 150 ml of vinegar or lemon juice, to make an acidic solution (PH 1 -PH 6). Citric acid is sold in asian supermarket and has very high acidity (more than vinegar and lemon juice)
+* **Water - 1000 L**, the solvent, ideally has a PH of 7.
+* **Soda ash - 5g**, 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. 
 
 ## Tools
 
 1. **Four glass jars** size depending on how much PH modifying solution you wish to prepare, 200 ml and up is convenient for dipping dyed textile swatches. 
+1. **Four spoons** don't mix the spoons, one per jar
+1. **A precision sclae** so you can measure tenths of a gram
 1. **A spray bottle - approx 100 ml** 
 1. **A small funnel** that fits the spray bottles
 1. **A baking tray or acrylic sheet** to dry the PH paper
-1. **Commercial PH measuring strips** or a PH measuring device
-1. **A stapler, or some paperclips, or sticky tape** 
+1. **A kettle**
+1. Optional: commercial PH measuring strips or a PH measuring device
+1. Optional: stapler, or some paperclips, or sticky tape and labels
 
 
 ## Yield before processing/drying/curing
 
-Approx. 200 ml of each and 60-100 PH strips.
+Four PH modifying solutions of approx. 170 ml each (PH 1-2, PH 5-6 acidic, and PH 9-10 and PH 13-14 alkaline), and 50-75 PH strips with reference.
 
 ## Method
 
@@ -56,23 +58,6 @@ Approx. 200 ml of each and 60-100 PH strips.
 	- Put the coffee filter on the baking tray/sheet
 	- Spray the coffee filter with the cabbage dye until it is totally covered (one side only). 
 	- Lay it flat and let it dry completely
-	- Empty and wash the spray bottle.  
-
-1. **Making the alkaline PH modifiers**
-	- Boil the water and divide it over two glass jars
-	- Add half a teaspoon of soda ash to one, and stir to dissolve. 
-	- Dip a piece of PH paper in to test the PH
-	- If it is higher than 7 your solution is alkaline. Bring the PH up to PH 9, this is a good starting entry point to modify dyes and inks with. 
-	- Do the same with the other jar but take the PH all the way up to PH 13, this can modify your dyes severely so take it step by step to see all the hues you can create. 
-	- Label the solution, mentioning the PH value and store in the glass jar or in a spray bottle.
-
-1. **Making the acidic PH modifier**
-	- Boil the rest of the water and divide it over two glass jars
-	- Add half a teaspoon of citric acid to one, and stir to dissolve. 
-	- Dip a piece of PH paper in to test the PH
-	- If it is lower than 7 your solution is turning acidic. Bring the PH down to 5 by adding little bits of citric acid. 
-	- Do the same with the other jar but bring the PH all the way down to PH 2, this can modify some dyes severely. 
-	- **NOTE**: if you don't have citric acid, you can work with lemon juice or vinegar but these are weaker acids. So work in the opposite order: put some vinegar/lemon juice in the jar, measure the PH and add a bit of water to bring the PH value up. 
 
 1. **Cut a PH paper booklet**
 	- When the coffee filters are totally dry, take them off the tray and fold them 3 times. 
@@ -80,6 +65,22 @@ Approx. 200 ml of each and 60-100 PH strips.
 	- Cut the closed fold open to separate the sheets
 	- Cut parallel lines into the stack of sheets (not all the way), to create strips you can tear off easily
 
+1. **Making the alkaline PH modifiers**
+	- Boil the water and divide it over the glass jars (170 ml each)
+		- Add 0.1 g of citric acid to one, and stir to dissolve. 
+		- Add 2.0 g of citric acid to another and stir to dissolve.
+		- Add 0.1 g of soda ash to the third and stir to dissolve.
+		- Add 2.0 g of soda ash to the last jar and stir to dissolve.
+	- **Optional**: Dip a piece of commercial PH paper in each of them to test the PH, they should be PH 1-2 and PH 5-6 (the acidic ones with citric acid) and PH 9-10 and PH 13-14 (the alkaline ones with soda). If you are getting different values, adjust the solution by adding more water or more citric acid/soda to make it more or less alkaline until you get the right PH values. 
+	- If you don't have PH paper, use your dyed coffee filter instead: 
+		- PH 1-2 = fuchsia pink
+		- PH 5-6 = pink/purple
+		- PH 7-8 = blue/purple
+		- PH 9-10 = turquoise (blue/green)
+		- PH 13-14 = green
+	- Label the solutions, mentioning the PH value and store in the glass jar or in a spray bottle.
+	- **NOTE**: if you don't have citric acid, you can work with lemon juice or vinegar but these are weaker acids. So work in the opposite order: put some vinegar/lemon juice in the jar, measure the PH and add a bit of water to bring the PH value up. 
+
 1. **Make a legend for your PH paper**
 	- Tear 5 pieces off of your PH paper
 	- Dip them in each of your PH modifiers, and dip one in tap water
@@ -88,7 +89,7 @@ Approx. 200 ml of each and 60-100 PH strips.
 	- Stick, glue or staple them on a piece of paper you can keep with your PH paper as reference. 
 
 1. **Using PH modifiers**
-	- Add the modifier directly to the dye to modify the entire batch (not recommended)
+	- Add the modifier directly to the dye to modify the entire batch (just add tiny little bits at a time and give it time to react, see what happens, then decide if you want to add more). Dyes can fade to very dull colors doing this. 
 	- Modify the dyed/stained material afterwards by dipping it into the modifier, spraying it on, or in some cases for textiles: let it simmer for 10 minutes on low heat. 
 	- You can use both modifiers at the same time to create colorful patterns and stains. 
 	- Some dyes allow you to go back and forth with the modifiers, but they will likely change if you modify them with PH 2 first and then bring it up to PH13, this could create hues than cannot be created using only one modifier. 
@@ -99,7 +100,6 @@ Approx. 200 ml of each and 60-100 PH strips.
 	- It is useful to know and record this information. For example, if a bioplastics mixture is very acidic (e.g. the starch-based plastics that contain vinegar), it will modify the color of a PH sensitive dye when you add it. Knowing this before hand will help you pick your dyes accordingly. 
 	- Also testing the PH values of water can be useful. In some recipes you might need to know if your tap water is alkaline or not so you can assess whether you need to offset it by adding some vinegar or other acid to your recipe (e.g. for growing kombucha SCOBY).  
 
-
 ### Process
 
 ![](../../images/phpaper13.jpg)*The cabbage dye on a coffee filter, drying, Loes Bogers, 2020*
@@ -175,13 +175,13 @@ By Cecilia Raspanti, Textile Lab, Waag Amsterdam, 9 March 2020
 
 ### Estimated cost (consumables) in local currency
 
-????? Euros for a yield of approx. 4x 200 ml
+0,02 Euros for a yield of approx. 4x 170 ml (ex. cabbage dye)
 
 ## Copyright information
 
 ### This recipe is in the public domain (CC0)
 
-Yes
+Not sure, but using red cabbage as a PH modifier is considered general knowledge. 
 
 ### This recipe was previously published by someone else
 
@@ -198,7 +198,14 @@ Partially, the PH paper is a variation on **How to make Red Cabbage PH Paper** b
 
 ## Images of final product
 
-![](../../images/finalpics-.jpg)*PH paper and PH modifiers, Loes Bogers, 2020*
+![](../../images/finalpics-184.jpg)*PH paper and an alkaline modifier, Loes Bogers, 2020*
+
+![](../../images/finalpics-185.jpg)*PH paper and an alkaline modifier, Loes Bogers, 2020*
+
+![](../../images/finalpics-186.jpg)*PH paper made with red cabbage ink, Loes Bogers, 2020*
+
+![](../../images/finalpics-187.jpg)*PH paper reference, Loes Bogers, 2020*
+
 
 
 
diff --git a/docs/images/finalpics-184.jpg b/docs/images/finalpics-184.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..b237915120e225d613cd05c6e7676b238092718a
Binary files /dev/null and b/docs/images/finalpics-184.jpg differ
diff --git a/docs/images/finalpics-185.jpg b/docs/images/finalpics-185.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..3e8374500c6026979736271f81fe160c2ed2e026
Binary files /dev/null and b/docs/images/finalpics-185.jpg differ
diff --git a/docs/images/finalpics-186.jpg b/docs/images/finalpics-186.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..136c27ff3711399a3e7a1554eba31180190bf3c5
Binary files /dev/null and b/docs/images/finalpics-186.jpg differ
diff --git a/docs/images/finalpics-187.jpg b/docs/images/finalpics-187.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..cefe365d3cdda76733b5fc190ee8decb58c284aa
Binary files /dev/null and b/docs/images/finalpics-187.jpg differ
diff --git a/docs/projects/final-project.md b/docs/projects/final-project.md
index aaa49cc42d3e91d8ebd6c4b95dcd2fca77a6bbcb..11f41975cb7a50f113f7fe0b92581bfa3f65d2bb 100644
--- a/docs/projects/final-project.md
+++ b/docs/projects/final-project.md
@@ -117,8 +117,8 @@ Anyone dedicated to biofabricating materials and some experience in at least one
 | 21| Madder dye | €2,01 | ![](../images/finalpics-83.jpg)  | [Recipe](../../files/recipes/madderdye) |
 | 22 | Red cabbage dye | €0,01 | ![](../images/finalpics-115.jpg)  | [Recipe](../../files/recipes/cabbagedye) |
 | 23 | Yellow onion skin dye | €0,02 | ![](../images/finalpics-143.jpg)  | [Recipe](../../files/recipes/oniondye) |
-| 24 | **PH modifiers for biochromes** | €0,00 | ![](../images/)  | [Recipe](../../files/recipes/phmodifiers) |
-| 25 | **Bacterial dye on silk** | €0,00 | ![](../images/finalpics-124.jpg)  | [Recipe](../../files/recipes/bacterialdye) |
+| 24 | PH modifiers for biochromes | €0,02 | ![](../images/finalpics-185.jpg)  | [Recipe](../../files/recipes/phmodifiers) |
+| 25 | Bacterial dye on silk | €0,00 | ![](../images/finalpics-124.jpg)  | [Recipe](../../files/recipes/bacterialdye) |