Żelatyna 250 gram

High-bloom hard gelatin 250 g is a professional, purified photographic reagent used in alternative photography and historical printing processes. It is a fundamental workshop material used for the preparation and refinement of paper substrates in hand-coated photographic techniques.

Unlike standard food-grade gelatin, this product features a higher bloom strength (higher Bloom rating), which translates into improved control over paper structure as well as greater stability of both light-sensitive and pigment layers.

Why not use food-grade gelatin?

Standard culinary gelatin available on the market is too soft for photographic applications. In practice, this leads to:

• unstable paper behaviour during wet processing
• excessive absorption of emulsions into the fibre structure
• the need to use large quantities of material
• reduced control over image sharpness and fine detail

As a result, the resulting protective layer does not meet the requirements of noble photographic processes, especially in multi-layer techniques.

Advantages of high-bloom photographic gelatin

High-bloom gelatin provides:

• Stable and even paper sizing – forms a controlled separation layer
• Improved sharpness and micro-detail – enhances image precision in pigment processes
• High working efficiency – lower material consumption with better final results
• Greater process repeatability – essential for edition work and workshop practice

Applications in alternative photography

This product is used in the preparation of substrates for both classical and contemporary noble photographic processes, including:

• gum bichromate printing (dichromate gum) – paper preparation and sizing
• pigment processes (carbon printing)
• modification and refinement of photographic papers
• preparation of supports for historical processes such as platinum/palladium printing and kallitype

Instructions for use

1. Soak gelatin in cold distilled water and allow it to swell (approx. 10–15 minutes).
2. Heat in a water bath to approx. 40–50°C, stirring gently until fully dissolved.
   Do not allow to boil.
3. Apply the warm solution to paper using a brush, sponge, or glass rod.

Product specifications

• Weight: 250 g
• Type: high-bloom hard gelatin
• Form: granules / powder
• Use: alternative photography, historical processes, paper preparation