diff --git a/docs/assignments/week04.md b/docs/assignments/week04.md index 1f0714a9bb63a06882630c292a7788ae41b7b3b3..ae741504da772ced767beb20c1ab84580298f157 100644 --- a/docs/assignments/week04.md +++ b/docs/assignments/week04.md @@ -94,7 +94,10 @@ I am also very excited to try out bacterial dyes. I am currently writing up a le  **Figure 7. Close up of patterns created by bacterial growth on fabric.** Patterns on the fabric are created by where the bacteria grew. The differences in fabric type dictated how bacterial colonies formed. *(From left to right: linen, silk, cotton)* +### Mushroom Pigment + +**Figure 1. The Laking Process.** First dye was extracted from the Dyer's polypore mushroom. Students used this dye bath for several of their projects. We used the remaining dye for this laking process. 10% alum solution was made and poured into the dye jar. Then a 2.5% soda ash solution was made and then carefully poured into the dye jar. The dye jar was allowed to sit overnight to separate. The left image shows the pigment nicely separated at the end of the waiting period. The top portion was carefully removed using a pipettor and then the bottom half of the solution containing the pigment was poured through a coffee filter to collect as shown on the right. The pigment on the coffee filter was allowed to dry and then stored. ## Discussion ### Plant-based dyes diff --git a/docs/images/week04/mushroom pigment.png b/docs/images/week04/mushroom pigment.png new file mode 100644 index 0000000000000000000000000000000000000000..185bed42793741b771012c03cd5b1c4e7185b6c8 Binary files /dev/null and b/docs/images/week04/mushroom pigment.png differ