AVCO-LACK BR

READY MADE PASTE FOR PRINTING PIGMENTS ON DARK GROUNDS
AVCOLACK BR is a special ready made paste, used to produce coloured prints on pre-dyed textile fabrics. The printed areas are elastic, and have good rubbing and washing fastness.

SPECIFICATION:

Appearance White, viscous paste.
Chemical nature Aqueous dispersion of opacifying pigments in acrylic binders, with special printing dditives.
Compatibility Can be mixed with all pigments and additives normally used in textile pigment printing.
Density 1.13 – 1.16 gr/cc
Ionicity Anionic / nonionic
pH (as is) 7 ± 1
Solubility Can be further diluted with water.
Storage Store in a cool place, in tightly closed drum Sensitive to frost. When properly stored storage time is at least 12 months.
Viscosity 60-80 d.Pa.s (Haake viscosimeter).

PROPERTIES & USES:

  1. AVCOLACK BR is a printing paste with excellent optical hiding properties,designed
    to
    produce colored prints on dark grounds.
  2. Use of AVCOLACK BR with transparent pigments produces strong visible and bright
    colored areas, even when printed on dark blacks and navy blues.
  3. White printing pastes, containing titanium-oxide are good opacifying pigments
    with
    excellent hiding power. But, these white pigments cause “fading out” of organic
    pigments added to them, “reds” become pink and “blues” produce light blue.
    Using
    AVCOLACK BR does not affect much the orginal shade of the added pigment.
  4. The cured prints of AVCOLACK BR are flexible and have good rubbing and washing
    fastness such as normal pigment prints.

APPLICATION:

  1. Preparation of printing paste:

    • Add AVCOLOR PIGMENTS to AVCOLACK BR to receive the desired shade. Use 1-6% of AVCOLOR PIGMENT on weight of AVCOLACK BR. Stir well with an high speed mixer until the paste is homogeneous and sieve through a suitable filter.
    • If needed, increase viscosity with AVCO-CLEAR NP or decrease it with electrolytes (ammonium salts).
    • To improve wash fastness, mainly when printing synthetic fabrics, add 0.5-1.5% of AVCO-PRINTFIX L.
  2. Printing
    • AVCOLACK BR can be used with all types of printing machines. Use of medium “mesh” printing screens is recommended.
    • After printing wash screens with a water stream.
  3. Fixation
    After printing and drying, a fixation process is necessary.
    Curing conditions are 150°C/3 min. Fixation time can be reduced by increasing the temperature – 180°C/1-1.5 min.
  4. Substrate
    AVCOLOR BR can be printed on all types of colored textile fabrics that are stable to the curing temperatures. When printing on synthetics care must be taken to use a fabric which is dyed with dyestuffs that are fast to sublimation and migration.