Ключевые слова: abstract, abstract net, art, backdrop, background, banknote, blank, blue, business, card, certificate, colored, coupon, currency, curvature, curve, deocrative, design, diploma, document, engraving, futuristic, geometric, gradient, guilloche, illustration, line, line art, linear, lines, moire, money, morphing, multicolored, net, ornament, paper, passport, pattern, pink, pinstripe, print, protection, red, repeat, ripple, secure, squiggle, squiggly, strip, striped, structure, subtle, surface, technology, template, texture, thin, ticket, undulating, voucher, wallpaper, warranty, watermark, wave, wave pattern, waveform, waving, waving lines, wavy, white, zigzag,