Page 4 SPECIFICATION RW 2510 ISSUE 2
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If this document is printed it becomes uncontrolled.
4.3.4 Print Performance - Legibility and Durability
Mark eighteen finished markers with the recommended Printer / ribbon system as shown in
document 411-121005. Print random characters across the length of each marker to within 6
mm (1/4 inch) of both ends using the font indicated in Table 2. Remove the specimens from the
carrier.
TABLE 2
Character Font and Size for Print Performance Testing
4.3.4.1 Recover three marked specimens in an oven for 3 minutes at 200 ± 5
o
C (392 ± 9
o
F) and
allow them to cool to room temperature.
The test pieces shall be tested for print permanence in accordance with SAE-AS5942 and
IEWI-012. The number of rubs and weight shall be as specified in Table 4.
Examine the marking for legibility at a distance of 356 mm (14 inches).
4.3.4.2 Recover nine marked specimens in an oven for 3 minutes at 200 ± 5°C (392 ± 9°F) and
allow them to cool to room temperature. Prepare three specimens for each of the following
three fluids:
a) One part by volume of isopropyl alcohol, American Chemical Society (ACS) reagent grade, or
isopropyl alcohol in accordance with TT-I-735, grade A or B and three parts by volume mineral
spirits in accordance with TT-T-291, type II, grade A, or in accordance with P-D-680, type I or
three parts by volume of a mixture of 80% by volume of kerosene and 20% by volume ethyl
benzene.
b) A terpene defluxer consisting of a minimum of 90% d-Limonene and 10% surfactant
1
c) A mixture consisting of the following:
1) Forty-two parts by volume water, I megohm-cm minimum resistivity
2) One part by volume of propylene glycol mono-methyl ether (glycol ether PM, 1-methoxy-2-
propanol)
3) One part by volume of monoethanolamine
2
4.3.4.3 Obtain a brush of the following description:
It shall be a toothbrush with a handle made of a non-reactive material. The brush is made of at
least three long rows, 28.5 ± 3 mm (1-1/8 ± 1/8 inch) in length, of hard bristles. Each row shall
contain eight to ten tufts, the free ends of which shall lie substantially in the same plane. Each
brush shall be used with a single solvent and when there is any evidence of softening, bending,
wear, or loss of bristles, it shall be discarded.
Maintain all solutions at a temperature of 23 ± 5°C (73 ± 9°F). Completely immerse the
specimens and the bristle portion of the brush for one minute in the specified solution.
Immediately following immersion, brush the specimen with normal hand pressure -
approximately 56 - 85 g (2 - 3 ounce) pressure - for ten unidirectional strokes on the portion of
the specimen where marking has been applied. Immediately after the initial brushing, repeat the
1
A commonly used terpene defluxer is BIOACT EC-7R. “BIOACT” and is a registered Trademark of Petroferm INC.
2
Normal safety precaution for handling this solution based on O.S.H.A. rules for monoethanolamine
