Rub and gloss acceptance: load, cycles, stock, and angle on one line

One line, or it is not a spec

“Rub 1500, gloss 80” cannot be run in a lab. The person with the instrument needs the load, the speed, what counts as a fail, the stock, and the gloss angle. Those items travel with the number. Split across two emails, they become two different tests.

The maker’s own 818D notes show why. One public line is A4 rub about 1000–1500 cycles at 4 lb and speed 2, with gloss about 65–75. Another is rub up to 1500 and gloss 80. Same grade name, different conditions. Your acceptance line has to pick a method. It does not get to quote both.

• Grade name and batch rule: the tin you test is the tin you reorder.
• Stock: inked solid, unprinted board, or both, and the grammage.
• Rub: instrument, load, speed, cycles, and the fail (transfer, show-through, haze).
• Gloss: instrument, angle, and where on the sheet.
• Who measures, and which retain sheet is kept.

A line that can actually be checked

Example shape, not a HuiRun limit: “818D batch as labeled, gold-free coated board 350 gsm, over black solid, rub on the plant’s instrument at the agreed load and speed, fail if ink transfers before the agreed cycles; gloss at the agreed angle on that solid.” Fill the blanks from the buyer’s method or from the TDS window you both accept. Do not fill them from the higher exhibition number because it looks stronger.

If nobody has an instrument, write “not measured” and keep a signed rub of thumb only as a workshop note. A thumb is not a cycle count. Do not let it into the purchase order.

What stays off the order

The order can name the grade, aqueous not oil, pack, kilos, Incoterm, and the TDS and SDS the factory already issues. It should not paste “1000–1500” or “gloss 80” as a warranted result. Those figures describe someone else’s lab. Honglu aqueous does not wear an 818D number even when both are water-based.

Incoming inspection still checks the delivery against the grade name. A rub dispute later needs the retain and the method line, not a new adjective.

When the two sides use different meters

Agree one meter, or agree that each side’s result is only compared with its own baseline. Two angles and two loads will not “almost” match. The related note on how a distributor answers a rub spec is the conversation. This note is the sentence you keep.

What the quote covers

Hefei HuiRun will attach the TDS. We will not retype its typicals as clause values, and we will not average 65–75 with 80 to make a middle number. Bring the method line if you want the quote to say which grade is worth a trial.