Red Lake Pigments Reconstruction: Logwood using tap water (Not actually red!)

Name: Emilie Foyer - Sayantani Mukherjee
Date and Time:

2015.10.19, Morning

Location: Chandler
Subject: Logwood Lake

9:47am
logwood put to soak in potash solution

11:40am
Logwood + 200 ml tap + potash set to heat in 250 ml beaker

11:42
added alum 6g alum to 50ml water and put to heat in small beaker. Completely dissolved at 11:47 and put aside.

11:50
Logwood + 200 ml tap + potash at 69C

11:55
85C

11:58
turned up hotplate from heat level 3 to 4

11:59
Boiling! Brought hotplate down to 1

12:09
boiled down to 150ml

12:10
took off heat

12:11
filtered solution in coffee filter

12:13
added alum solution to logwood +potash
Created dark effervescence. Dark purple color!

12:23
ph difficult to measure because of dark color
estimate of Ph 5-7

Set to rest

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