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Vim li cas cov neeg sau npe siv tus cwj mem tshwj xeeb?

Cov txheej txheem:

Vim li cas cov neeg sau npe siv tus cwj mem tshwj xeeb?
Vim li cas cov neeg sau npe siv tus cwj mem tshwj xeeb?
Anonim

Ink siv tau los ntawm Cov Neeg Sau Npe thiab Cov Txiv Plig kos npe rau cov ntaub ntawv tseem ceeb tiv thaiv kev sau ntawv tsis dhau sijhawm. Nws raug nquahu kom koj ntxuav koj tus cwj mem nrog dej ua ntej rov ua dua lossis khaws koj tus cwj mem tom qab siv tus cwj mem no.

Tus neeg sau npe yog dab tsi?

Iron gall based Blue-Black Archival ink uas yog tus qauv kev lag luam rau cov ntawv khaws cia ruaj khov hauv UK raws li siv los ntawm ntau tus neeg sau npe.

tus lej sau npe yog dab tsi?

Nws yog Ink uas yuav tsum tau ua rau cov ntaub ntawv tseem ceeb xws li daim ntawv pov thawj Yug, Daim Ntawv Pov Thawj Tuag thiab ntawm cov txiv plig rolls.

Puas sau npe tus number case tawm?

Yog li dab tsi tshwj xeeb ntawm tus lej sau npe? Zoo, nws tsis tuaj yeem rub tawm, lossis ntxuav tawm, thiab nws tsis ploj. … Thov nco ntsoov – tus number case no zoo li xiav dub, tab sis thaum qhuav oxidises dub.

Dab tsi yog qhov tsis zoo ntawm cov kua nplaum hlau?

Iron-gal ink muaj ib qho tsis zoo. Dawb acid feem ntau tshwm sim, uas tsis yog tsuas yog corrodes steel cwjmem phem, tab sis, deb heev, tawm tsam daim ntawv, nrog rau qee yam ntawm cov dyes siv los xim rau lawv.

Pom zoo: