GB/T 26714-2019Ball point pens and refills (English PDF)

3.1 Pen point classification

The pen point is classified by ball diameter (see Table 1).

4.3 For ball point pens used by underage students, the contents of

transportable elements in the ink and the coating on the pen holder (including

the pen cap) in the pens or refills shall comply with the provisions of 3.1 in GB

21027-2007.The pen cap safety shall be in accordance with the provisions of

3.7 in GB 21027-2007.

5.1 Rounded drawing writing machine

When using a rounded writing machine, the setting shall meet the following

conditions.

a) writing load.

ball diameter D < 0.5 mm, 0.98 N,

ball diameter D >= 0.5 mm, (1.5 ± 0.1) N;

b) writing angle. (75 ± 5)°;

c) scribing speed. (4.5 ± 0.5) m/min;

d) writing format. continuous helix (perimeter of 100 mm) with spacing of 1

mm ~ 5 mm;

e) liner plate. polished stainless steel plate.

5.2 Writing paper

The one which complies with GB/T 12654-2008, of which the quantitative

specification is 80 g/m2.

5.3 Sample

In addition to the preservation test, take the unused ball point pen and refill

within six months since the date of production as testing sample.

5.4 Environmental conditions

In the absence of special provisions, the test shall be carried out under the

following environmental conditions.

a) ambient temperature. 15°C ~ 25°C;

b) relative humidity. 50% ~ 80%.

b) 500 g special balance weight of which the bottom diameter is 50 mm.

6.4.2 Method and steps

When 6.2 c) scribing ends, start the stopwatch timing till 20 s. Cover the same

type of writing paper on the end trace. Use the special balance weight to

press on the cover paper surface. Re-timing. After 10 min, separate two

papers. Check the cover paper and there should be no ink.

6.5 Copyability test

6.5.1 Instruments and materials

a) copying equipment (copier or fax machine)'

b) copy paper.

6.5.2 Method and steps

a) put the sample paper into the copying equipment;

b) start the copying equipment; the trace on the copy paper shall meet

requirements specified in Table 4.

6.6 Water resistance test

6.6.1 Materials and utensils

a) distilled water;

b) 200 mL beaker.

6.6.2 Method and steps

Place the sample paper under testing environmental conditions for 2 h. Add

the beaker and immerse it in distilled water. Immerse 1 h for "general writing",

6.7 Lightfastness test

6.7.1 Test equipment

UV light box (light box inner diameter of 220 mm ~ 230 mm, UV light. power

of 30 W, wavelength of 2.537 × 102 nm, lamp length of 900 mm).

6.7.2 Method and steps

Place the sample paper at a distance of 100 mm from the UV lamp for 72 h

6.10.1 Utensils and materials

a) ethanol (GB/T 678);

b) distilled water;

c) 200 mL beaker.

6.10.2 Method and steps

Prepare the ethanol aqueous solution of which the volume fraction is 50%.

Place the sample paper under testing environmental conditions for 1 h. Place

the beaker and immerse it in the ethanol solution. Take it out after 10 min.

Immerse it in the distilled water for 10 min. After taking out, dry it naturally.

The trace on the sample paper shall meet requirements specified in Table 4.

6.11 Hydrochloric acid resistance test

6.11.1 Utensils and materials

a) hydrochloric acid (GB/T 622);

b) distilled water;

c) 200 mL beaker.

6.11.2 Method and steps

Prepare the hydrochloric acid aqueous solution of which the mass fraction is

10%. Place the sample paper under the testing environmental conditions for 1

h. Place the beaker and immerse it in the hydrochloric acid solution. Take it

out after 24 h. Immerse in the distilled water for 10 min. Take it out and dry it

naturally. The trace on the sample paper shall meet requirements specified in

Table 4.

6.12 Ammonia resistance test

6.12.1 Utensils and materials

a) ammonia (GB/T 631);

b) distilled water;

c) 200 mL beaker.

6.12.2 Method and steps

Prepare the ammonia solution of which the mass fraction is 10%. Place the

sample paper under the testing environmental conditions for 1 h. Place the

where,

h - difference between pen holder head aperture and pen head outer diameter,

in millimeters (mm);

d1 - minimum value of pen holder head aperture, in millimeters (mm);

d2 - maximum value of pen head, in millimeters (mm).

The calculation result shall be indicated by two digits after the decimal point.

6.16 Metallic clip elasticity test

6.16.1 Test equipment

Insert (wood chips, plastic sheet or metal sheet) of which the thickness is 3

mm.

6.16.2 Method and steps

Put the insert between the pen cap (holder) and pen clip bead. Take the insert

out after 10 min placement. Check and it shall be seamless between the pen

cap (holder) and pen clip bead.

6.17 Impact resistance test

6.17.1 Test equipment

Fir board of which the thickness is 30 mm.

6.17.2 Method and steps

6.17.2.1 Place the fir board of which the thickness is 30 mm on the...

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