ISO 2846 process ink colour: what it means on your press

A lab print is not a press OK

ISO 2846 families specify colour and transparency of CMYK inks printed under laboratory conditions on a defined stock. A tin can be 2846-conformant in the maker’s lab and still miss your customer’s sheet if density, trap, and paper differ.

ISO 12647 and G7 talk about the printed sheet and grey balance. Do not ask HuiRun for “ISO ink” without saying which document the buyer will audit.

• Ask whether the claim is 2846 (ink) or 12647 / G7 (print).
• Conventional and UV process sets have separate lab paths.
• Honglu and LOCOER process grades we quote follow their maker TDS; we do not issue ISO certificates.
• Measure solids and greys on your stock, not only on a proofing press.
• Related G7 article covers density and TVI language.

What we put on a quotation

We can pass through a manufacturer statement that a named SKU was designed toward a 2846 condition. We will not stamp “ISO certified by HuiRun.”

Paper is half the colour

Optical brighteners and coat shade move Lab even when the ink is the same. Send a mill sheet with the RFQ if the buyer is colour-critical.

UV process sets

UV-G and Honglu UV are not interchangeable with conventional 2846 prints. If the job is UV, say so; the lab condition changes.

What the quote covers

Hefei HuiRun sells ink. Accreditation lives with labs and with the print site. Bring a spectro printout if a lot is accused of “not ISO.”