Gypsum by weight or volume? - Gourmet and Medicinal Mushrooms

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worowa
Professor

Registered: 06/29/07
Posts: 301
Last seen: 27 days, 1 hour

Gypsum by weight or volume?

#9019260 - 10/02/08 05:05 PM (15 years, 6 months ago)

I was making some substrate yesterday-Acacia wood shavings, wheat bran and gypsum. On p150 of GGMM 3rd edition, Stamets has 2 formulas-both have 8 times as much bran as gypsum, but one formula is volumetric, the other by weight.

Gypsum is much heavier than bran. Is there a typo, or am I missing something?

Do you measure by volume or weight?

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wisp

Registered: 04/13/08
Posts: 5,304

Re: Gypsum by weight or volume?

[Re: worowa]
#9019406 - 10/02/08 05:31 PM (15 years, 6 months ago)

I measure by volume.

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denger
Mycelium keeper

Registered: 09/19/08
Posts: 1,177
Loc: Unites States of Dreams
Last seen: 1 year, 6 months

Re: Gypsum by weight or volume?

[Re: wisp]
#9019506 - 10/02/08 05:50 PM (15 years, 6 months ago)

Well, I always measure by weight. So far, I only saw the by weight recipes in Stamets and elsewhere.

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solumvita
Q.B.E.

Registered: 02/12/08
Posts: 2,061
Loc: South Africa
Last seen: 10 months, 4 days

Re: Gypsum by weight or volume?

[Re: denger]
#9040837 - 10/07/08 06:38 AM (15 years, 6 months ago)

You would normally use by weight, based on the ratio in the recipe.
Say you wanted 2.5% gypsum and mixing 1 kg that would equate to 25 grams of gypsum.

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