Introduction
A sagging tester is an instrument used to evaluate the sag resistance of the paints and the coatings, by the application of the coating at the different thicknesses and the observation of the sagging, and it is used in the paint, the coating, and the many other industries for the quality control and the product development. The sagging tester consists of a multi-notch applicator or a blade, which applies the coating in the strips with the increasing thicknesses on the test panel, and a holder, and the coated panel is placed in the vertical position, and the sagging of the coating, which is the downward flow of the wet film, is observed after a specified time; the sag resistance is determined by the maximum thickness at which the coating does not sag, and the sagging tester is used for the evaluation of the sag resistance of the paints and the coatings, for the assessment of the flow and the leveling, for the quality control, for the product development, for the comparison of the formulations, and for many other applications, and it is available in various configurations, with the different ranges of the film thicknesses; the sagging tester is an essential instrument for the testing of the coatings. Sagging testers are used in the paint and the coating industry, in the laboratories, in the research, and for many other applications. With their sag resistance testing, sagging testers are essential for the coating quality control.
Sagging Tester LSIT-T2012
Sagging Tester has a precise range of 450 to 675 µm for accurate assessment of the relative sag resistance in paints and coatings for reliable formulation control. The tester includes u...
Sagging Tester LSIT-T2011
Sagging Tester features 25 µm spacing between adjacent notches, providing clear visual separation between each level. It includes a distinctive gap reading that allows precise identific...
Sagging Tester LSIT-T2010
Sagging Tester features a range of 50 to 275 µm, assessing the relative sag resistance of paints. It includes multiple clearance ranges, enabling accurate determination of the maximum n...
Standards
ISO 13803:2014-Paints and varnishes-Determination of haze on paint films at 20 degrees
ASTM D823-18-Standard Practices for Producing Films of Uniform Thickness of Paint, Coating, and Related Products on Test Panels
Complies with the above standards, but is not limited to them.
Features
1. Sagging tester for evaluating sag resistance (anti-sag) of paints, coatings and similar materials on vertical surfaces.
2. Instrument to measure the tendency of a wet coating to run or sag downward after application on a vertical panel.
3. Suitable for paint, coating, ink, adhesive, construction, research and quality control laboratories.
4. Includes sag applicator (multi-notch), test panels, evaluation standards, support/rack and operation manual.
5. Supports sag resistance assessment for architectural paints, industrial coatings, primers, adhesives and sealants.
FAQ
Q1: What testing scenarios is this tester mainly applied to?
A: The sagging tester is used in paint and coating manufacturing, ink production, adhesive/sealant manufacturing, construction materials, research, and quality control laboratories to evaluate the sag resistance (anti-sag properties) of paints, coatings, and similar materials - measuring the tendency of a wet coating film to run or sag downward when applied to a vertical surface, which affects application quality (runs, drips, uneven film thickness) on walls, doors, and other vertical substrates. It supports architectural paint testing (interior/exterior latex paints, alkyd enamels - sag resistance critical for vertical application (walls, doors, trim); poor sag causes runs/drips; measured by maximum film thickness before sag), industrial coatings (automotive coatings (vertical panels), coil coatings, wood coatings, metal coatings - sag affects finish quality), primers and undercoats (often applied thicker - sag resistance important), adhesives and sealants (caulks, adhesives applied vertically - sag/slump resistance), construction (masonry paints, texture coatings, waterproofing), and quality control (raw material evaluation (thickeners, rheology modifiers, anti-sag agents), formulation development (balance sag resistance vs leveling - anti-sag agents can reduce leveling), in-process testing, finished product specification, batch-to-batch consistency).
Q2: What standards does the tester comply with?
A: The sagging tester follows relevant ISO, ASTM, DIN and GB/T standards including ISO 1520 (related), ASTM D4400 (standard test method for sag resistance of paints by the multi-notch applicator method), ASTM D373 (related), DIN 53158 (leveling and sagging test), and GB/T standards for paint sag resistance. The hardware complies with applicable precision standards. Calibration uses reference paints of known sag resistance or certified applicator gap verification. For regulated industries, follow ISO 9001/GMP and maintain records.
Q3: What is the warranty period for the whole tester and key components?
A: The whole sagging tester is covered by a 12-month warranty. The sag applicator (multi-notch), panel support/rack, and housing are covered, while applicator (wear part), test panels, calibration standards, and cleaning supplies are consumables/accessories. Damage from improper use, bending/notch damage, dropping, corrosion, or unauthorized repair is excluded. Extended warranty may be available. Sagging testers are simple mechanical instruments - with proper care they last many years; applicators and panels are consumables.
Q4: Is this device difficult to operate? Is professional training required?
A: Operation requires trained laboratory personnel familiar with paint/coating testing. We provide operation manuals and training. Proper instrument preparation (inspect sag applicator (multi-notch blade with gaps of increasing/decreasing size) for cleanliness and notch integrity, ensure vertical panel support/rack is level and vertical), sample preparation (homogenize paint, bring to 23 +/- 2 degrees C, avoid bubbles), test application (place test panel (glass, steel, or chart) horizontally, apply coating using sag applicator (drawdown with multi-notch blade creating strips of varying film thickness (e.g., 50-500 micrometers in increments); immediately place panel vertically (within specified time, e.g., 10-30 seconds) with the notched strips horizontal (so sag is downward perpendicular to strips), allow to dry/cure under controlled conditions (23/50% RH, specified time), evaluation (examine dried film: find the thickest strip (largest gap) that does NOT show sagging (runs, drips, merging of strips); the sag resistance is reported as the film thickness (micrometers or mils) of the thickest non-sagging strip (higher = better sag resistance); compare with reference standards if available), post-test (clean applicator immediately before paint dries (notches are hard to clean when paint dries - use appropriate solvent, brush for notches), dispose/retain panels), maintenance (regular cleaning (especially notches), applicator inspection (notch wear/damage), calibration every 6-12 months with reference paint), and safety (PPE, fume hood for solvent-based paints, careful handling of sharp applicator blade) are important for accurate sag resistance measurement.
Q5: What is the typical lead-time for order delivery?
A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.
Q6: Is regular calibration required? What is the recommended calibration cycle?
A: Calibration verification recommended every 6-12 months using reference paint of known sag resistance or certified applicator gap verification (measure notch depths with calibrated gauge). If applicator notches are worn/damaged, replace/recalibrate. Routine inspection before each use. For ISO 17025/GMP labs, maintain records. Sagging testers are mechanical and stable, but applicator notch wear and panel verticality affect results - regular verification is important.
Q7: Are supporting consumables universal?
A: Sag applicators (multi-notch blades with specific gap ranges - various ranges available), test panels (glass, steel, Leneta charts - standard or specific), reference paints/sag standards, panel support/rack, cleaning supplies (brushes for notches, solvents), and gloves are available from paint/lab supply companies, though applicators and reference standards may be specific. Long-term consumable cost is minimal.
Q8: Can I customize parameters or supporting accessories?
A: Customization includes applicator notch range (e.g., 50-300 micrometers, 100-500 micrometers, 200-1000 micrometers - chosen based on expected coating thickness), number of notches (typically 10-12 strips), applicator type (single blade, adjustable, automated), test panel (material, size), evaluation method (visual, instrumental (profilometer, image analysis)), accessories (reference paints, applicators, panels, drying rack, calibration certificate), and certifications. Additional accessories can be ordered separately.
Q9: Does the purchase include on-site installation and commissioning service?
A: Standard delivery includes sagging tester (applicator, rack), test panels, reference standards (sometimes), and manual. On-site installation is not required (manual instrument, no power needed). On-site training can be arranged at additional cost. Remote guidance is provided.
Q10: What types of samples are compatible with this equipment?
A: The sagging tester evaluates sag resistance of liquid coatings including architectural paints (latex, alkyd, enamel, primers, ceiling paints), industrial coatings (automotive, coil, can, wood, metal, marine), adhesives/sealants (caulks, adhesives, gap fillers - vertical application), construction coatings (masonry, texture, waterproofing), and other flowable coatings applied to vertical surfaces. NOT compatible with dry powders, very fast-drying coatings (sag behavior changes too quickly), non-liquid/powder coatings (unless liquid), and highly thixotropic materials (may need different method). Sag resistance is inversely related to leveling - anti-sag additives (thickeners, rheology modifiers) improve sag but can reduce leveling; formulation must balance both properties for good application appearance.
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