Step 9 of 14 · Natural Bio Shampoo From Scratch
Add preservative at supplier dose
Add preservative at supplier dose — step 9 of 14 in Natural Bio Shampoo From Scratch. Geogard ECT typical 0.6–1% of total batch — calculate on 250 ml. Stir 60 seconds. Skipping this = shower mold in three weeks.

Free beauty & grooming tip: Add preservative at supplier dose (step 9 of 14 from "Natural Bio Shampoo From Scratch").
Geogard ECT typical 0.6–1% of total batch — calculate on 250 ml. Stir 60 seconds.
Skipping this = shower mold in three weeks.
Pro tip: Preservative works only if pH is in its effective range — read supplier sheet.
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