Vodič za Nanošenje Metalik Boja Pištoljem
Korak-po-korak tehnički vodič za pneumatsko nanošenje metalik pigmenata (zlato, srebro, sedef) na reljefne profile.
Nanošenje metalnih boja (zlatna, srebrna, bakarna i sedef) pištoljem za farbanje omogućava postizanje savršeno glatke, svilenkaste refleksije bez tragova četke na kompleksnim poliuretanskim reljefima.
Potrebna Oprema i Podešavanje Pištolja
- Inspect and Clean Polyurethane Substrates — Ensure the rigid polyurethane moulding is completely clean, dry, and free of oil or grease. Lightly abrade the factory-primed surface using granulacija 180-220 sandpaper to ensure proper paint mechanical keying.
- Execute Joint Cutting and Mounting — Cut moulding ends at precise 45-degree miter angles. Apply polyurethane assembly adhesive to the joint surfaces and backboard; never use silicone. Fasten the profiles mechanically using screws to ensure structural stabilization.
- Seal Fasteners and Apply Secondary Primer — Fill screw heads and miter joint seams with polyurethane-compatible putty. Sand the filled areas smooth with granulacija 180-220 sandpaper once cured. Apply an optional acrylic or polyurethane primer coat over exposed filler or bare cut edges.
- Prepare Paint and Spray Equipment — Thoroughly mix the solvent-based metallic paint with a mechanical stirrer to suspend all pigments. Pour the paint into a top-gravity feed spray gun fitted with a nozzle size of no greater than 1.3 mm.
- Calibrate Fluid and Air Settings — Adjust the spray gun controls to restrict fluid flow while maintaining high atomizing air pressure. Test the spray fan pattern on a scrap piece to verify fine atomization without wet paint build-up.
- Apply Thin Primary Metallic Coats — Spray two thin, light coats over the polyurethane moulding from a distance of 15–20 cm, using 50% pass overlaps. Periodically shake or stir the top-gravity cup during spraying to prevent metallic pigment settling.
- Execute the Misting (Dusting) Coat — Immediately after the base coat pass, pull the spray gun back to 30–40 cm distance. Apply a light, fast misting pass with low fluid volume to land orientation-controlled metallic flakes uniformly across the surface.
Protokol Konstantnog Mešanja Pigmenata
Metalni pigmenti su teži od veziva i brzo se talože na dnu posude. Neophodno je periodično protresti pištolj i temeljno promešati boju pre svakog novog punjenja kako bi nijansa bila 100% ujednačena.
Korak 1: Priprema i Matiranje Podloge
Beli fabrički prajmer beli jednokomponentni akrilni prajmer blago se prebriše finom šmirglom granulacija 180-220 i detaljno očisti antistatičkom krpom od mikro-čestica prašine.
Korak 2: Nanošenje Tankih Slojeva
Podešava se nizak protok boje i visok protok vazduha. Boja se nanosi u 2 do 3 veoma tanka sloja sa međurazmakom sušenja od 15-20 minuta.
Korak 3: Završni Prašina-Sloj (Misting / Dusting)
Na samom kraju, sa veće udaljenosti (oko 40-50 cm), raspršuje se vrlo suv «prašina-sloj» (dusting) koji omogućava metalnim ljuspicama da se savršeno horizontalno orijentišu i daju pun metalni sjaj.