Click here to make tpub.com your Home Page

Page Title: Qualitative requirements (all types)
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home

   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 




img
MIL-E-24763A(SH)
w/INT. AMENDMENT 1
e.
Blistering shall be rated not less than 10.
f.
When CIE color values of the exposed test panels are compared to the original CIE color values of the
test panel, the ASTM D2244 color difference calculated values shall conform to the following values:
1) Delta E shall not be greater than 1.0 CIELAB units.
2) Delta a shall not be greater than positive or negative () 1.0 CIELAB unit.
3) Delta b shall not be greater than 1.0 CIELAB unit.
4) Delta L shall not be greater than 1.0 CIELAB unit.
3.8. Qualitative requirements (all types). The enamel shall meet the following qualitative requirements
specified herein.
3.8.1. Condition in container. When tested in accordance with method 3011.3 of FED-STD-141, the
enamel shall be ready mixed and shall show no hard pigment settling, phase separation, evidence of biological
growth, livering, skinning, putrefaction, corrosion of the container, pigment float, grit or seed particles, or persistent
foam. Any settled or floating pigment shall be easily and completely reincorporated by mechanical shaking within 5
minutes to a smooth and uniform condition, free from persistent foam. When tested in accordance with 4.6.5, the
CIELAB color difference of the mixed enamel shall meet the requirements of 3.7.1.1. After a standing period of 2
hours without further mixing, the CIELAB color difference of the enamel shall again be tested in accordance with
4.6.5. The CIELAB color difference measured for 2-hour-old mixed enamel shall be not greater than 0.5 CIELAB
units different from the color values measured after stirring, but before the 2-hour standing period. After standing
for 2 hours, there shall be no settling or pigment float.
3.8.2. Resistance to biological growth. When tested as specified in 4.6.9, the enamel film shall have a
surface disfigurement rating of greater than or equal to 8 when evaluated against adjunct no. 12-432740-00 as
specified in ASTM D3274.
3.8.3. Freeze-thaw stability. When tested as specified in 4.6.10, the enamel shall be free of livering,
curdling, hard-dry caking, pigment settlement or pigment float and tough, gummy sediments. The enamel shall mix
readily with a paddle or mechanical mixer within 5 minutes to a smooth, uniform state, free of grits, seeds, tough or
gummy sediment, skins, pigment settling and persistent foam. The tested enamel shall show no flocculation and its
consistency shall change not greater than 8 KU compared to the paint in the original, unopened container in the as-
received condition. Additionally, the tested enamel shall meet the requirements of gloss retention and color change
required by 3.7.2.
3.8.4. Storage stability.
3.8.4.1. Shelf life.  When tested as specified in 4.6.1.1 one year after date of manufacture, unopened full
container of enamel shall be free of grits, seeds, tough or gummy sediment, skins, pigment settling and persistent
foam. The tested enamel shall mix readily to a smooth, uniform state with a paddle or mechanical mixer within 5
minutes and show no flocculation and its consistency shall change no greater than 8 KU as compared to the paint
when first delivered. Additionally, the tested paint shall meet the requirements of 3.7.2. When tested in accordance
with 4.6.5, the CIELAB color difference of the mixed enamel shall not be greater than 1.0 CIELAB units from the
original color values measured prior to the shelf life test. The mixed enamel shall also meet the requirements of
3.7.2. The one year paint shelf life is non-extendable.
3.8.4.2. Partially-full container. After exposure as specified in 4.6.1.2, the enamel shall show no skinning,
pigment float, livering, curdling, hard dry caking, or tough or gummy sediment. The enamel shall mix readily to a
smooth uniform state within 5 minutes when mixed with a paddle or mechanical mixer to a smooth, uniform state,
free of grits, seeds, lumps, and skins. When tested in accordance with 4.6.5, the CIELAB color difference of the
mixed enamel shall be not greater than 0.5 CIELAB units from the original color values measured before the shelf
life test. The mixed enamel shall also meet the requirements of 3.7.2.
11

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business