How do you use for dyeing? Thought it might of came with instructions

I used this method to prepare cotton fabric for marbling ; Prepare Your Fabric (The Day Before) Mix 2 tablespoons of alum into two gallons of water. (The ratio of alum to water is 1:1.) Place all the fabric you're planning on marbling in the solution for 20 minutes. (Don't leave it any longer or it can ruin the fabric.) After 20 minutes remove the fabric from the water. I did all this outside, in case of strong odours, and hung the fabric to dry on the outside line. Hope this helps!

How much would I need to use in a 2m x 0.50m planter to change the Ph which is 6-7 reading. Thank you.

I have never done this but suggest you Google 'what is aluminum sulphate used for in horticulture'. There is quite a lot of info out there.

Does this contain potassium or not?

No - This product is Aluminium Sulphate Al203 alternatively know as Al2(SO4)3 - It is a Sulphate and does not contain Potassium.

Can i make crystals with this

Hi, Yes you can make crystals with this!

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250g bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3

250g bag ALUMINIUM SULPHATE 17% Iron Free Alum Al2(SO4)3

Product ID: 118194823

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Details

Brand
Trustleaf
Molecular weight
192.13
Package information
Bag
Item form
Powder
Manufacturer
Trustleaf

🌱Organic-agriculture safe & iron-free

📏Compact 250g bag, easy storage

⚗️17% pure aluminium sulphate concentration

Description

⚡ Elevate your craft and garden game with pure, versatile alum power!

ORGANIC FRIENDLY - Certified safe for organic agriculture and horticulture use
PRECISION PURITY - 17% iron-free aluminium sulphate for consistent, reliable results
COMPACT CONVENIENT - 250g crystalline bag designed for easy handling and storage
HYDRANGEA HUE CONTROL - Easily tweak soil pH to transform your garden’s hydrangea colors
VERSATILE APPLICATION - Perfect for dyeing, water purification, paper-making, and soil pH adjustment

Trustleaf’s 250g Aluminium Sulphate bag delivers 17% iron-free alum in crystalline form, ideal for professional dyeing, water purification, paper-making, and organic horticulture. Its unique ability to adjust soil pH makes it a must-have for gardeners aiming to customize hydrangea colors, all while supporting eco-friendly practices.

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