A 25 kg multi-wall paper bag for titanium dioxide and other fine mineral pigments. The printed face carries the grade, the composition table with CAS numbers and the HMIS hazard block, so the bag itself shows the labelling a pigment warehouse has to keep on file. Block bottom, pasted valve and glued seams hold a dense 25 kg fill steady on the pallet and clean at the filling spout.
| Structure | Block bottom, pasted valve |
| Wall | Multi-wall paper, 3 ply standard, 2 – 4 ply available |
| Capacity | 25 kg standard, 5 – 50 kg custom |
| Printing | Flexographic, up to 6 colours |
| Bottom | Glued block bottom |
| Valve | Pasted valve sleeve on the shoulder |
| Options | PE-coated inner ply, moisture barrier, handle, perforations |
| MOQ | From 500 pieces |
Grade and hazard data printed in — a CAS-referenced composition table and HMIS ratings are part of the artwork, not a sticker applied later.
Paper that holds a dense 25 kg fill — multiple plies and a glued block bottom carry pigment without the bulge a single-wall sack shows.
Fills through the valve — the pasted sleeve takes the filling spout on an automatic line and closes itself, with no sewing step.
Sits flat on the pallet — the square block bottom stacks predictably in a container instead of rolling.
Two to four paper plies are glued into a tube, then fitted with a block bottom and a pasted valve sleeve. The printed outer ply carries brand, grade and the compliance block; the inner plies provide strength and, where specified, a PE-coated layer for moisture resistance. Glue lines are the weak point of any paper bag, so the bottom and the longitudinal seam are the two areas checked hardest at the end of the line.
Titanium dioxide, rutile and anatase grades
Iron oxide and other mineral pigments
Plastic colourants and masterbatch powders
Fine chemical powders packed at 25 kg
Ply weight, glue seam strength, valve opening, print registration and bag dimensions are checked per batch. Filled bags are drop tested from 1.2 metres on a full 25 kg load before shipment.
Yes. Grade, CAS-referenced composition and HMIS ratings are printed as part of the artwork, in one or more colours.
A PE-coated inner ply can be added for humid destinations; plain paper suits dry, short-haul distribution.
The pasted sleeve lets the bag be filled through a spout on an automatic line and close itself afterwards, without sewing.
From 500 pieces per size and design. Browse the full category for other structures.
Send your fill weight, bag dimensions and artwork. Request a quote or message us on WhatsApp at +86 152 5775 2994.
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