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Questions Provided by Solaiman Bin Ali(Lecturer, DoWPE, BUTEX)

N.B: Each Question Contains 1 Mark

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1. Which chemical is mandatory for pre-treatment of fabric before digital printing?

Thickener
Solvent
Biocide
Buffer solution

2. How does generally printing is done?

Continuous with batch wise form
Continuous with open width form
Semi-continuous with batch wise form
Semi-continuous with open width form

3. Which colorant matches with “Locus bean gum” as a thickener for printing?

Acid dye
Reactive dye
Vat dye
Pigment

4. Why does “Acrylic” based synthetic thickener requires alkali medium in print paste?

Improving solubility in the print paste
Increasing printing fixation
Attributing sharpness of the print paste
Incorporating holding capacity

5. If w=mesh opening & d=thread diameter, then which relationship provides best ink transparent for lower viscosity print paste?

w>d
w=d
w less than d
Actually, no relationship is required

6. Why does “Rest position” include in the “Screen”?

Maintaining proper shade%
Holding screen during printing
Providing stability during printing
Helping squeegee’s rotational movement

7. Which printing method is suitable printing of “Cotton” with reactive dye in transfer printing system?

Sublimation
Melt
Film
Wet

8. .If T=temperature of paper & Tr=transition temperature, then which option suits for transfer printing?

T> Tr
T= Tr
T< Tr
T=1/Tr

9. How much total time actually require for passing a printed fabric from 2nd to 7th washing boxes in comparison with the time of 1st to last boxes at washing zone?

1/4 times
1/2 times
3/4 times
1/3 times

10. How does “Mercerization” facilitates better lusture properties?

Improving absorbency by adding alkali
Creating gap between chain as well as fiber’s uniformity
Increasing better exhaustion properties by applying caustic
Attributing proper dimensional stability of the fabric

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