GENUS
Boletopsis
SPECIES
grisea
TYPE
Polypore
BATCH:
01
DYE PREPARATION
DYE PREPARATION
CONDITION
dried
PARTS
entire mushroom
PRE-SOAK
VINEGAR
pH
9
RATIO
1:2
TEMP
165° F
TIME
1 hr.
PIGMENT PREPARATION
PIGMENT PREPARATION
CONDITION
dried
PARTS
entire mushroom
RINSE
Twice
BINDER
gum arabic
TEMP
85° F
BATCH NOTES

Boletopsis grisea likes a high pH but not immediately. I let it warm for about 20 minutes and then shifted it to pH 9. I kept the temperature up high around 165 degrees for an hour. I put the iron swatches in last, after I removed the alum and tin swatches because the reaction between the Boletopsis and iron is such that it will contaminate the alum and tin swatches. In general this is a really good practice to abide by for all natural dyes but for the studies in the Mushroom Color Atlas I only did it where noted.