Pre-Test Coating Technology

Pre-Test Coating Technology

Professional Development

10 Qs

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Pre-Test Coating Technology

Pre-Test Coating Technology

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Professional Development

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Manakah pernyataan yang TIDAK benar tentang fungsi binder?

Merekatkan partikel pigment antar satu sama lain.

Mengatur viskositas coating agar tetap rendah.

Membantu partikel coating melekat ke permukaan base paper.

Membantu mengisi ruang antar partikel dalam coating.

2.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Faktor apa yang paling memengaruhi proses penetrasi coating ke base paper?

Daya sebar pigmen

Struktur pori base paper

Daya larut binder

Komposisi additives

3.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Dalam proses dispersing, peran dispersant adalah …

Menjaga stabilitas thermal slurry coating

Menjaga agar partikel pigment terdistribusi merata dan tidak aglomerasi

Mencegah terbentuknya busa selama mixing

Mengurangi gesekan antara coating dan mesin

4.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Bagaimana cara kerja sensitizer pada kertas thermal?

Meningkatkan reaktivitas binder agar coating tahan air

Menurunkan suhu leleh leuco dye dan developer untuk reaksi lebih cepat

Menjaga agar pewarna leuco tetap stabil pada suhu tinggi

Membentuk mikrokapsul agar pewarna tidak lepas prematur

5.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Apa alasan teknis penggunaan biocide dalam sistem coating kitchen?

Mencegah pertumbuhan bakteri pada slurry coating yang dapat menurunkan kualitas

Meningkatkan kecepatan dispersi pigment

Mempercepat reaksi cross-linking binder

Menstabilkan nilai pH slurry pada kondisi netral

6.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Fungsi utama dari thickener (rheology modifier) adalah...

Menstabilkan warna coating

Mengontrol viskositas dan aliran slurry

Mempercepat proses pengeringan

Meningkatkan opasitas secara kimia

7.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Mekanisme utama terbentuknya warna pada kertas NCR dimulai dengan...

Oksidasi leuco dye oleh udara

Pelelehan developer

Kontak tekanan yang memecah microcapsule

Absorpsi warna oleh base paper

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