Photographers' Formulary 10g Potassium Alum Photographic Hardener
See all Photographers' Formulary items

Photographers' Formulary 10g Potassium Alum Photographic Hardener

SKU: PYAL10G MFR: 10-0030 10G
Be the first to review this itemAsk a Question
$3.95
Earn VIP Reward Points

Key Features

  • Achieve archival quality prints with our Potassium Alum photographic hardener.
  • Potassium Alum ensures fine grain in your black and white film development process.
  • Get consistent results every time with this easy-to-use darkroom chemical.
  • Extend the life of your prints; use Potassium Alum for hardening solutions.
  • This photographic hardener is perfect for creating high contrast images.
  • Use in fixing baths and clearing baths for optimal black and white results.
See More Product Details
Special Order?Estimated to Ship: 08/16/2025
Add to List

Need help? Ask our experts.

Overview
Compare
Specs
Q&A

Questions & Answers

Reviews about this item

Review Summary

Photographers' Formulary Potassium Alum Specifications

  • Synonyms

    Alum
    Alum flour
    Alum meal
    Aluminate
    Common alum
    Cube alum
    Octohedral alum salt
    The potassium double sulfate of aluminum
    Potash alum
    Alum
    Sulfuric acid, aluminum potassium salt (2:1:1), dodecahydrate
    Potassium alum dodecahydrate
    Alum Potassium USP Powder TAC
    Potassium alum
    Kalinite

  • Appearance

    Large, colorless, hard transparent crystals
    White crystalline powder

  • Uses

    Hardening solutions for fixing baths
    Ingredient of the hypo-alum toning bath
    Clearing bath

  • Chemical Formula

    KAl(SO4)2.12(H2O)

  • Weight

    10g (0.35oz)

About Photographers' Formulary Potassium Alum

The Photographers' Formulary Potassium Alum is used in Hardening solutions for fixing baths, Ingredient of the hypo-alum toning bath and Clearing bath.

Note:

Cake alum, found in grocery stores can be substituted for potassium alum.

Join VIP PRO

2 Day Delivery on thousands of items!

Sell or Trade your Gear

Get started in 3 easy steps

Key Features

  • Achieve archival quality prints with our Potassium Alum photographic hardener.
  • Potassium Alum ensures fine grain in your black and white film development process.
  • Get consistent results every time with this easy-to-use darkroom chemical.
  • Extend the life of your prints; use Potassium Alum for hardening solutions.
  • This photographic hardener is perfect for creating high contrast images.
  • Use in fixing baths and clearing baths for optimal black and white results.