Screen Printing on NanoPaper: Mesh, Setup, Curing

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Stencil & mesh (starting points)

Mesh: 325–400 stainless or polyester (select for your ink’s solids/viscosity).
Emulsion: per vendor; target uniform EOM; avoid pinholes.
Target prints in one pass; multiple passes only if your ink system requires thickness.

Setup

Snap-off: light; just enough to release.
Squeegee: medium durometer, low attack angle, steady speed.
Flood: light flood, then print. Keep dwell minimal.

Registration & hold-down

Use a flat, clean platen. Frame with low-tack tape or alignment jigs; do not stretch the sheet.

Dry, anneal, sinter (ink-dependent)

Stage drying to remove solvent before higher-temp steps.
Gradual ramp to mitigate moisture-driven curl.
Example flow: 60–80 °C dry → 120–150 °C anneal → higher-temp step if required by ink.

QC checklist

Edge acuity & line/space under optic microscope.
Adhesion (tape or cross-hatch).
Sheet resistance / continuity on test traces.
Dimensional stability after cure (measure fiducial spacing).

Troubleshooting

Feathering/bleed: mesh too open, squeegee pressure high, or substrate too moist.
Pinholes: contamination or under-flooding.
Lift/poor adhesion: insufficient dry/anneal or chemistry mismatch—consult ink promoter/primer guidance.