Polyester Screen Printing Mesh: Complete Buyer's Guide

Polyester screen printing mesh (also called silk screen mesh or polyester bolting cloth) is a precision-woven fabric stretched over a frame to carry emulsion and transfer ink onto substrates. Unlike natural silk used historically, modern polyester monofilament mesh offers consistent aperture size, low elongation under tension, and resistance to the solvents and UV emulsions used in industrial printing.

Kaibang's mesh is manufactured entirely from polyester monofilament (PET 100%) using weaving looms imported from Germany and Switzerland, then heat-set to lock mesh geometry and stabilize tension.

Mesh count (threads per centimeter, or T/cm) is the single most important specification for print quality. Higher mesh counts hold finer detail but restrict ink flow; lower counts pass more ink and suit coarser substrates.

•  Mesh Count vs. Application

Mesh Count (T/cm)	Approx. Mesh/inch	Typical Application
8–21 T	20–55 mesh	Heavy-deposit printing: textiles, thick ceramic glaze
28–47 T	70–120 mesh	General textile & paper printing, packaging ink
54–80 T	137–200 mesh	Fine-line graphics, electronics (PCB solder mask)
90–130 T	230–330 mesh	Solar panel silver paste, LGP dot printing, glass decal
140–165 T	355–420 mesh	Ultra-fine detail: CD/DVD coating, ceramic decals

•  Choosing Between White and Yellow Mesh

White mesh diffuses light during exposure, which can cause slight halation at the emulsion edge. Yellow mesh absorbs scattered UV light and produces sharper stencil edges - it is preferred for fine-pitch electronics printing (e.g., PCB pads below 100 μm). For general graphic or textile jobs, white mesh is equally effective and slightly lower cost.

• Thread Diameter and Opening Rate

Opening rate (also called open area %) directly affects ink deposit volume. For a given mesh count, a thinner thread diameter increases opening rate and ink flow; a thicker thread adds durability. Kaibang supplies both Standard (S) and Thick (T/HD) variants for many mesh counts. Example: at 54 T/cm, the PW(T) variant has a 39% opening vs. 35% for the PW(HD) variant - use PW(T) for flat colors and PW(HD) for extended run lengths.

All values below are from Kaibang's production standard for PET 100% monofilament mesh. Thread diameters and opening thicknesses are measured on finished, heat-set fabric.

Grade	T/cm	Mesh/inch	Aperture (μm)	Thread Dia. (μm)	Opening %	Thickness (μm)
13-150PW(SL)	13	33	619	150	64%	300
21-80PW(S)	21	55	296	80	69%	120
32-55PW(S)	32	81	257	55	67%	103
40-80PW(T)	40	103	166	80	44%	133
47-55PW(S)	47	120	152	55	51%	88
54-64PW(T)	54	137	115	64	39%	100
64-64PW(T)	64	160	85	64	30%	115
77-55PW(T)	77	195	67	55	27%	88
90-48PW(T)	90	230	56	48	25%	78
120-34PW(T)	120	305	45	34	30%	55
140-31PW(S)	140	355	36	31	26%	48
165-31PW(S)	165	420	23	31	15%	48

Full 42-grade specification sheet available on request. All data verified against production inspection records.

The following properties are intrinsic to PET monofilament and are consistent across Kaibang's full mesh range:

Property	Value / Rating	Relevance to Printing
Tensile strength	High (PET monofilament)	Withstands repeated squeegee pressure without deformation
Elongation under tension	Low / stable	Frame tension remains consistent over long print runs
Aperture uniformity	Controlled by heat-setting	Repeatable ink deposit volume print-to-print
Chemical resistance	Acid & alkali resistant	Compatible with UV, water-based, and solvent ink systems
Thermal stability	Heat-set during manufacturing	Resists distortion from IR dryers and heated platens
Air permeability	High open-area variants available	Facilitates faster ink release and cleaner release from substrate
Working life	Long (vs. stainless wire)	Cost-effective for medium and high-volume production

 

•  Electronics: PCB and Solar Panel

PCB solder mask and silver paste printing require the most demanding mesh specifications. Misalignment or inconsistent deposit thickness causes yield loss. For PCB solder mask flood coat, 43–54 T/cm PW(T) mesh in yellow is the standard choice: the yellow color minimizes photographic halation, and the controlled aperture ensures uniform paste height. For crystalline silicon solar cell silver-paste finger printing, 90–120 T/cm mesh is commonly specified, as finger widths of 80–60 μm require the finer apertures.

• Glass and Ceramic Decoration

Glass decoration inks are often frit-based and abrasive. Kaibang's PW(T) (thick variant) grades at 28–47 T/cm provide adequate durability against abrasion while maintaining sufficient aperture for ceramic frit particle passage. For tempered-glass frost printing or color ceramic decals, 54–68 T/cm is typical.

• Textile Printing

Flat-bed and rotary textile printing uses the widest mesh widths - Kaibang supplies rolls up to 3.65 m wide, which covers most industrial flat-bed frame sizes without joining. For discharge printing and plastisol inks on cotton, 32–47 T/cm white mesh is standard. For fine halftone sportswear graphics, 54–68 T/cm is used.

• Advertising, Packaging, and General Graphics

Spot-color poster and packaging printing operates in the 40–64 T/cm range. Kaibang's 47-55PW(S) grade, with its 51% open area, is a versatile all-round choice for water-based and UV-curable ink systems on paper, cardboard, and plastic substrates.

Factor	Polyester Monofilament Mesh	Stainless Steel Wire Mesh
Cost	Lower (✔ for high-volume runs)	Higher material cost
Weight on frame	Light, easy to handle	Heavier
Chemical resistance	Excellent vs. acids/alkalis	Good, but can corrode with aggressive cleaners
Elongation / creep	Minimal with heat-set PET	Very low
Static charge (electronics)	Can build charge (use anti-static coatings)	Conductive, dissipates static naturally
Fine-detail capability	Excellent to 165 T/cm	Available but expensive at high mesh counts
Fragility	Less prone to damage from accidental contact	Sharp edges, mesh can snag
Recommended for	General industrial, electronics, textiles, solar	High-abrasion ceramics, some specialty printing

For the vast majority of industrial screen printing applications, polyester monofilament mesh is the correct choice on both performance and cost grounds.