Firstcall Photographic

Bergger PMK Developer Roto Additive - 250ml

Bergger PMK Developer Roto Additive - 250ml - Main image
$6.03 $8.26 In stock

Category: Film & Film Processing Film Processing Chemicals

If you're using PMK in a rotary processor like a Jobo CPP, we recommend that you include this additive, which has been specially formulated by Bergger, to retain the full efficacy of the developer.


Use between 1+50 and 1+100 dilution which must be then added to your PMK working solution.


We also recommend that you fine-tune the advisory developing times on the attached PMK PDF datasheet to obtain the result your are most satisfied with.

Check your selection

Confirm your chosen option and quantity before paying.

Delivery timing

Check the estimate before ordering for a particular date.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
Refund enquiries

Contact the store with the order number and item you are asking about.

Please contact us for the refund processing timeframe before returning an item.

View policy
Shipping charges

Review the charge for your selected delivery service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Planning a return

Contact the store before returning an item; the policy below applies.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.6 / 5 · 5 reviews)

Nicholas ★★★★★

I was worried the PMK would lose its punch in my Jobo, but this additive keeps the developer working exactly as it should. The 250ml bottle has lasted through several sessions without any drop-off in results.

Brian A. ★★★★★

Finally a way to keep PMK potent in my Jobo without losing contrast on the negatives. The additive mixes in cleanly and I've noticed consistent stain density from roll to roll.

Abigail ★★★★★

Mixing this into my PMK for rotary processing was a game-changer—no more worrying about the developer losing potency in the tank. The 250ml bottle is the perfect size for my usual batch runs.