pā pā PS

ʻO ka manaʻo o ka pā PS he pā i hoʻohana mua ʻia i ka paʻi offset.I ka paʻi offset, hele mai ke kiʻi e paʻi ʻia mai kahi pepa alumini i uhi ʻia, i hoʻonoho ʻia a puni ka pahu paʻi.Hoʻomaʻamaʻa ʻia ka alumini i mea hydrophilic kona ʻili (e huki i ka wai), aʻo ka pā pā pā PS i kūkulu ʻia he hydrophobic.
ʻElua ʻano o ka pā PS: pāpaʻi PS maikaʻi a me pā pā PS ʻino.ʻO lākou, ʻo ka pā pānaʻi PS maikaʻi no ka māhele nui, i hoʻohana ʻia i ka hapa nui o nā hana paʻi ʻana i ka paʻi nui i kēia lā.Ua oo no hoi kona hana enehana.
Hana ʻia ka pā PS me ka substrate a me ka uhi pā pā PS, ʻo ia hoʻi, ka papa photosensitive.ʻO ka substrate ka hapa nui o ka papa kumu alumini.ʻO ka papa kiʻi kiʻi he papa i hana ʻia e ka uhi ʻana i ka wai kiʻi kiʻi kiʻi ma ka pā kumu.
ʻO kāna mau mea nui he photosensitizer, mea hana kiʻiʻoniʻoni a me ka mea kōkua.ʻO ka photosensitizer maʻamau i hoʻohana ʻia i loko o nā pā PS maikaʻi he resins photosensitive ʻano diazonaphthoquinone ʻano hoʻoheheʻe ʻia ʻoiai ʻo ka pā PS maikaʻi ʻole he resins photosensitive ma muli o azide.
Loaʻa i ka pā positve PS nā mea maikaʻi o ke kaumaha māmā, ka hana paʻa, nā kiʻi akaka, nā papa waiwai, a me ka maikaʻi o ka paʻi kiʻekiʻe.ʻO kāna mea hana a me ka hoʻohana ʻana he hoʻololi nui i ka ʻoihana paʻi.I kēia manawa, ua hoʻohālikelike ʻia ka pā PS me ka hoʻonohonoho ʻano uila, ka hoʻokaʻawale kala uila, a me ka paʻi offset multicolor, i lilo i ʻōnaehana platemaking mainstream i kēia mau lā.