|Colorspec Tintable Multicolor has it's own unique characteristics which differentiate it from other types of multicolor paint. This technical bulletin is intended to highlight these differences. By following these instructions, your customer can achieve a trouble free multicolor application.
STORAGE AND USE
Colorspec is relatively fast drying
(1-2 hours to touch). If skinning occurs during storage, carefully remove skins and, if necessary, filter the paint by pouring through a metal mesh filter which eliminates the skins. When necessary to thin or reduce multicolor, stir in water gradually in small increments (3 to 4 fluid ounces per addition, not to exceed 5% in total) until acceptable spray pattern is achieved. Too much water will cause paint to sag. Colorspec is also freezable and heat sensitive and must be protected.
TINTING, MIXING AND COLOR APPROVAL
Colorspec is intended for use with Blend-a-Color universal colorants. Always use Sherwin-Williams color cards or Color Specifier fan deck as your primary color reference when choosing a tint color formula for use with Colorspec.
Do not utilize a tint dispenser with a line flush (such as Sher-Tint), as line flush will prevent tint from dispersing properly. Sher-Tint dispensers can only be used if line flush feature is shut off. Colorspec is intended for tinting to colors which would normally be tinted in Sherwin -Williams Interior Extra White Base. Use quart tint formula (25% of 100% gallon tint formula) per gallon of Colorspec to create tinted multicolors that approximate Sherwin-Williams colors. Do not exceed one ounce of colorant per gallon of Colorspec.
When colorant is added to multicolor, agitate on a gyroscopic mixer for one minute...not to exceed three minutes. Vigorous agitation may break down color flecks and change appearance of multicolor. Tinted Colorspec that has been stored should always be stirred gently with a paint paddle prior to use.
Always get specifier approval of tinted Colorspec sample prior to tinting entire order. Spray sample at full-coat coverage and let sample dry prior to seeking color approval. Tinted multicolor has a bluish milky cast when still wet. Always box or intermix multiple containers of Colorspec after tinting, to assure color uniformity in all containers.
SURFACE PREPARATION AND PRIMING
Surface must be clean, dry, flat and without defects. Prime with appropriate primer/sealer/stainkiller required for surface to be painted. Use premium quality primer, like Sherwin-Williams PrepRite Classic, having good holdout and tooth. When in doubt, check intercoat adhesion between primer and multicolor topcoat prior to proceeding with application. Do not prime with flat wall paint.
SUGGESTED SPRAY EQUIPMENT
Colorspec is designed to be applied with specific H.V.L.P. and conventional dual regulated air spray equipment. Do not use airless spray equipment. Remove all filters and strainers from spray equipment prior to use (line, gun and siphon tube). Adjust material and air pressure as needed to match approved sample sprayout. See Spray Equipment Guidelines on reverse side.
H.V.L.P. (High Volume Low Pressure Spray Equipment)
- Color standard sprayouts are sprayed with Binks Mach I, tip 97AS with ASME dual-regulated pressure pot
- Spray TECH CS9100, or CS10,000 with #5 or #6 tip set and pressure pot hook up
- Titan Profinish with pressure pot hookup with .073 needle/nozzle set and #3 air cap
Conventional Air Spray Equipment
- Binks External Mix Nozzle Assembly Gun 2001, air nozzle #66SK, fluid nozzle 66, needle valve 565. Use an ASME dual-regulated pressure pot. Do not use #200 internal mix aircap for conventional ( Binks 2001) spray gun. Do not use airless spray equipment.
- For industrial application use Binks external mix nozzle assembly. Gun 2001, Air cap 66 P.D., fluid tip 66, needle valve 565. Use an ASME dual-regulated pressure pot (adjust air pressure and material pressure for desired results)
See “Spray Equipment Guidelines”
Other H.V.L.P. or conventional spray equipment may be used. For specific recommendations contact equipment manufacturer or sales representative.
Set material and air pressure to match approved sprayout. Gun air pressure and material pressure will vary depending on spray equipmentand batch of paint used.
First, apply a tack coat to facilitate full-coat application. Maintain uniform distance of 18-24" between the gun and surface. Aim spray gun directly at surface (spraying at an angle will distort pattern). Spray horizontal strokes, overlapping each previous stroke by 50%, then crosshatch the same area with vertical strokes to eliminate any lap marks and to achieve full-coat coverage.
Finish may vary from standard due to variations in batch tinting, equipment, pressure settings, substrate and technique. Always evaluate color, pattern and paint delivery rate on mock-up test area while using specific batch of paint with equipment selected for job and be certain that mock-up meets with the approval of specifier prior to beginning job. Note: Printed literature will vary in color and pattern from actual Colorspec sprayout samples. Make certain to purchase enough material of a given batch to complete the job.
FULL-COAT APPLICATION REQUIREMENT
Within Colorspec multicolor, individual color flecks are suspended in a clear water phase. In conventional untinted multicolors, the water phase is water clear. During spraying, the painter sees the flecks being deposited on the surface and changing the surfaces appearance during each spray stroke. Once full-coat coverage is achieved, additional spray strokes do not change the appearance of the finish.
With Colorspec, only the clear water phase is tinted. The tint colorants do not tint the flecks, but rather surround these flecks. When spraying tinted Colorspec, the entire surface sprayed is colored during each spray stroke, even though the multicolored flecks are not covering the entire surface. This makes it more difficult to determine when full- coat coverage has been achieved. While a surface sprayed with less than full-coat coverage may look attractive, subsequent applications or touchups which put more flecks on the surface will be very noticeable, and will not blend in well with the surrounding area. Such surfaces will need additional coats of tinted Colorspec to achieve a uniform, full-coat coverage application. To assure yourself of full-coat coverage, first do a mock-up area following our spray technique. Check application against a sprayout standard for color and pattern. Once approved, the mock-up test area can serve as the standard for the job.
If Colorspec is not properly applied, the following will occur:
- color and pattern will not match standard
- application will look uneven
- lap marks will be visible
- picture framing may be visible
- finish will not touch up satisfactorily
- film properties will not be attained
|TOUCH-UP OR REPAIR
If possible, touch ups should be done by using the same application equipment, settings and technique that were originally used to spray the job. A mock up should be done first to insure that proper appearance can be achieved. If the mock up appearance is acceptable, a spot repair can be done using a feathering technique to blend in the touch up with the adjacent area. For best results, a corner-to-corner full coat application may be necessary.
In high traffic areas, harsh environments or areas subjected to repeated cleaning, a suitable clear topcoat is recommended. Such settings might include hospitality, healthcare, educational, office and manufacturing facilities. Use Multispec MCT Clear Waterborne Acrylic Polyurethane, or for higher performance applications, utilize a compatible, clear water white plural component epoxy or polyurethane.
Colorspec may be washed with mild detergents and water. Overly aggressive cleaning and/or use of cleaning compounds containing coarse abrasives or harsh chemicals may lighten the color or alter the sheen of tinted Colorspec. Always try specific cleaner and cleaning technique in an inconspicuous area prior to use.
Roller application of tinted Colorspec is not recommended. Although untinted Colorspec bases can be rolled over white SE1 basecoat, tinted Colorspec should not be applied with a roller. Rolling tinted Colorspec will lead to Tiger striping in overlap areas that will likely lead to an unacceptable finish. An example would be cut-in areas such as corners, window and door edges. After these areas are cut in and in a dried or semi-dried state, subsequent applications over these areas will be darker than the just-rolled adjacent area. A good analogy is that of staining wood. Overlap areas are generally darker and the final finish is uneven. While lack of uniformity may be acceptable for faux finishing applications, it is generally unacceptable for conventional wall finishing.
NOTE: For roller applications, use untinted Colorspec or Multispec Watercolors applied with a Speckle Effects reticulated foam roller and rolling technique over SE1 basecoat.
For Multispec Watercolors with over 50% white background, use over untinted SE1 white basecoat. For Multispec Watercolors with a different predominant background color (over 50%), tint the SE1 basecoat to approximate the predominant background color.
For more information, read Colorspec specifications and label copy, or contact:
MULTICOLOR SPECIALTIES, INC.
Order Department 800-362-6617