Information on the most widely used ASTM standards within the materials testing industry
Model: UT4157; ASTM F2357
UnitedTest is a professional manufacturer of RCA paper tape abrasion tester, fully engineered following Norman Tool 7-IBB /7-IBB-CC RCA abrader design and compliant with ASTM F2357, ASTM F3152 standards. This point-contact abrasive wear tester evaluates the abrasion resistance of printed inks, painted coatings, plated layers, laser marking and graphic legends on flat or contoured specimens. It is widely adopted for QC, incoming inspection, R&D validation and laboratory wear testing for consumer electronics, automotive components and plastic finishing industries.
Relevant Standards
ASTM F2357: Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool “RCA” Abrader (ASTM F2357-04, ASTM F2357-10 historical versions).
ASTM F3152-16: Supplementary RCA abrasion test specification for controlled abrader operation and consistent test reporting.
General introduction
UnitedTest is a professional manufacturer of RCA paper tape abrasion tester, fully engineered following Norman Tool 7-IBB /7-IBB-CC RCA abrader design and compliant with ASTM F2357, ASTM F3152 standards. This point-contact abrasive wear tester evaluates the abrasion resistance of printed inks, painted coatings, plated layers, laser marking and graphic legends on flat or contoured specimens. It is widely adopted for QC, incoming inspection, R&D validation and laboratory wear testing for consumer electronics, automotive components and plastic finishing industries.
Relevant Standards
ASTM F2357: Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool “RCA” Abrader (ASTM F2357-04, ASTM F2357-10 historical versions).
ASTM F3152-16: Supplementary RCA abrasion test specification for controlled abrader operation and consistent test reporting.
What is an RCA paper tape abrasion tester?
An RCA paper tape abrasion tester — historically the Norman Tool RCA Abrader, models 7-IBB (mechanical revolution counter) and 7-IBB-CC (digital programmable counter) — is the industry-standard abrasion resistance testing machine for thin surface layers. The “RCA” name comes from the Radio Corporation of America, whose in-house durability specification for printed legends on consumer products created the method; Norman Tool, Inc. (Evansville, Indiana) has built the instrument continuously since 1964.
The tester answers one simple purchasing question that no other abrasion test answers well: will the printed logo, key legend, decorative ink or thin lacquer on this part survive years of fingertip contact, wiping and handling? Because the abrasive medium is a low-cost paper tape that presents a fresh, uncontaminated surface on every increment, the RCA method avoids the debris build-up error that plagues fixed-medium abrasion tests.
UnitedTest supplies an ASTM F2357-compliant RCA paper tape abrasion tester with the same three-selectable-load architecture, the same 11/16 in (17.46 mm) paper tape path, and a full set of specimen fixtures and consumables.
Key Features
1. Three standard load weights: 55 g, 175 g, 275 g, easy to swap to meet different coating hardness requirements (275 g is default standard load)
2. Digital cycle counter with auto-stop function, counting range: 0–999,999 cycles; stable cam driving mechanism for constant tape feeding speed
3. Continuous fresh abrasive paper feeding system: unused abrasive tape touches the sample all the time, no debris accumulation to interfere test results, better repeatability than reciprocating friction testers.
4. Compatible with Norman original RCA abrasive paper tape: 0.6875 inch (11/16”) wide standard paper tape, optional 0.25 inch polyester tape for fine graphics and concave surfaces
5. Integrated leveling bubble and magnifier lamp for real-time visual inspection of wear breakthrough
6. Rigid aluminium alloy base, stable running, low vibration; CE certified, factory calibrated before shipment
7. Custom fixture support for flat, curved, cylindrical and contoured workpieces
A. Machine set-up
Place the tester on a rigid bench and level it using the spirit level and the four adjustable feet — the bubble must sit centrally.
Select the mode: continuous contact (cam follower disengaged) or intermittent contact (cam engaged: ~1.5 s down / 2.0 s up). ASTM F2357 and most corporate specs use continuous mode.
Fit the load: no counterweight = 275 g; one counterweight = 175 g; two counterweights = 55 g.
Thread the tape: supply reel → guide rollers → down through the vertical shaft → under the O-ring head → take-up reel. Tighten the take-up reel screws.
B. Specimen preparation
Mount the specimen rigidly on the fixture so it cannot deflect, move or make the arm bounce, and so the test surface is perpendicular to the load.
Clean the test area with a clean, lint-free absorbent material wetted with reagent-grade n-heptane or isopropyl alcohol; wipe lightly.
Air-dry for a minimum of 2 hours, then inspect to confirm the cleaning did not damage the surface.
Check the target area for residue, ink quality or coating defects before starting.
C. Running the test
Align the target test point under the abrader head; set the counter to zero.
Adjust the applied force to 175 g unless otherwise specified.
Gently lower the abrader head onto the specimen (use the slide pin and surface gauge to set parallelism, then remove the slide pin).
Start the motor. Run to the specified number of cycles, or until the visual end point appears.
Stop periodically to inspect. Do not move the specimen during interim inspection — re-aligning the wear path is the single biggest source of scatter.
Remove loose debris by light brushing or clean compressed air.
Record cycles to wear limit and to final breakthrough; photograph the track.
Model number and description of the abrasion tester used
Abrasive material (type, width, abrasive factor, lot)
Force applied to the specimen (55 / 175 / 275 g)
Number of cycles to wear limit (N/A for transparent coatings)
Number of cycles to final breakthrough
Temperature and humidity during the test
Specimen identity — material and coating description
Cleaning method used, if applicable
Visual evaluation, with photographs of the target test area where possible
ASTM F2357: Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool “RCA” Abrader (ASTM F2357-04, ASTM F2357-10 historical versions).
ASTM F2112 — Terminology for Membrane Switches (referenced by F2357).
ASTM F3152 — a related method used where colour measurement (ΔE) supplements visual end-point reading.
ASTM D4060 / ISO 5470 / ASTM G195 — Taber rotary abrasion (bulk coating wear, mass loss / wear index).
Motorola / RCA-legacy corporate specs — many consumer-electronics supply chains still cite an internal RCA spec: 175 g, continuous mode, ≥ 40 cycles with no worn-through area ≥ 0.1 mm × 0.2 mm.
The RCA abrasion tester converts rotary motion into a controlled linear rubbing action:
Drive system. A constant-speed motor drives the take-up reel at about 17 rpm, pulling the abrasive paper tape from a supply reel. One revolution of the drive roller equals one cycle and advances 157 mm of tape; at 17 rpm that is roughly 2,670 mm of tape per minute (about 20 cycles/min, 2.1 in/s).
Tape path. Nylon guide rollers keep the tape centred so the wear track stays on the target point. The tape passes down through the vertical shaft and contacts the specimen over a small rubber O-ring (the abrader wheel), which conforms slightly to surface irregularity and gives a repeatable contact patch.
Loading. The weight of the rocker-arm/vertical-shaft assembly applies the normal force. The base configuration is 275 g; adding one counterweight reduces the load to 175 g, two counterweights to 55 g. ASTM F2357 defaults to 175 g unless otherwise specified.
Counting. A mechanical rotary counter (0–9,999) or a digital LCD counter with presettable stop point (0–999,999) records cycles and switches the motor off automatically.
End point. The operator stops periodically and inspects the track under the illuminated magnifier. The result reported is the number of cycles to wear limit and/or final breakthrough.
Why "fresh media" beats a fixed abrasive
Because the tape advances continuously, every increment presents unused abrasive to the surface. Wear debris cannot accumulate in the contact zone and cushion later cycles, which is why the RCA method produces tighter cycle-to-failure distributions than tests where the abrading surface is reused.
- Silicone rubber keypads, membrane switches, printed graphic overlays
- Mobile phone, tablet, wearable device housing, lens frame, decorative coating
- Automotive interior trim, button printing, piano black paint, electroplated parts
- Home appliance plastic shells, remote control legends, cosmetic case coating
- Anti-fingerprint coating, UV varnish, pad printing, screen printing, laser etch marking durability verification
- Factory QC lab, third-party testing laboratory, material supplier R&D, IATF16949 / ISO9001 compliance testing
Main Technical Specification
| Load | 275g, 175g, 55g |
| Counter | Rotary counter |
| Machine rate | 1 min/2670mm, 1 cycle/157mm, continuous operation |
| Machine speed | 15~17 rpm |
| Power | AC 220V, 50HZ. |
| Dimensions | 800×300×380mm |
| Accessories | 1. Weight reduction pieces: one of 55g and 175g each 2. Hex wrench set 3. Level 4. Magnifying glass with light 5. Two dovetail clamps 6. Five O-rings 7. One roll of paper tape |
Standard
ASTM F2357 Standard Test Method for Determining the Abrasion Resistance of Inks and Coatings on Membrane Switches Using the Norman Tool "RCA" Abrader
ASTM F2357 defines a comparative, accelerated abrasion test in which a strip of abrasive paper (or polyester tape) is drawn repeatedly across the printed or coated surface of a membrane switch under a specified normal load, and the surface is inspected at intervals until a defined visual failure point is reached. The result is reported as the number of cycles to "wear limit" and to "final breakthrough." It is explicitly a relative ranking tool — not a predictor of service life in finger-touches.
ASTM F3152 Standard Test Method for Determining Abrasion Resistance of Inks and Coatings on Substrates Using Dry or Wet Abrasive Medium
ASTM F3152 evaluating abrasion resistance of surface‑printed inks and coatings on substrates, supporting both dry‑abrasion and wet‑abrasion modes with optional chemical exposure.
ASTM D4060 Standard Test Method for Abrasion Resistance of Organic Coatings by the Taber Abraser
ASTM D4060 evaluates the abrasion‑resistant performance of organic coatings applied onto flat rigid substrates (e.g. metal panels) by means of a Taber Abraser instrument. It quantifies coating wear under controlled rotary friction‑abrasion conditions, and defines three major evaluation metrics: wear index, weight loss, and wear cycles per mil coating thickness.
ASTM D1044 Standard Test Method for Resistance of Transparent Plastics to Surface Abrasion
ASTM D1044 test methods for transparent plastics, designed to quantify surface scratch/wear damage via optical haze change instead of mass or volume loss (volume loss measurement is abandoned due to poor inter-laboratory repeatability). The core evaluation indicator is haze difference (Δhaze) between unabraded and abraded samples.
ISO 5470-1: Rubber- or plastics-coated fabrics -- Determination of abrasion resistance -- Part 1: Taber abrader.
ISO 5470-1 specifies a method for determining the abrasion resistance of rubber- or plastics-coated fabrics using the Taber abrader apparatus. This test simulates wear under controlled conditions to evaluate a material's durability.
RCA vs Taber vs steel wool: which abrasion test do you need?
| ttribute | RCA paper tape (ASTM F2357) | Taber rotary (ASTM D4060) | Steel wool / linear abrader |
|---|---|---|---|
| Abrasive medium | Unlubricated paper tape or polyester tape, continuously renewed | Two bonded abrasive wheels (CS-10, CS-17, H-18…) | #0000 steel wool pad, cotton, eraser, sandpaper |
| Contact | Line / small patch, fingertip-like | Large cross-hatched annulus | Pad, reciprocating |
| Load | 55 / 175 / 275 g | 250 / 500 / 1000 g per wheel | ≈165 kPa (24 psi) and above |
| Result | Cycles to wear limit / breakthrough | Mass loss (mg), wear index, cycles to breakthrough | Haze gain, scratch rating |
| Best for | Thin surface layers: printed legends, inks, thin lacquer, plating | Bulk coating / substrate wear resistance | Hard coats, optical and glazing surfaces |
| Sensitivity | Highly sensitive to surface defects and ink adhesion | Insensitive to thin surface print | Sensitive to scratch and haze |
Rule of thumb used by most QC labs: Taber measures the “bulk” of the coating system; RCA measures the “skin”. For multilayer parts — printed legend on a painted plastic housing — you run both: RCA for the ink, Taber or cross-cut adhesion for the coating system.
How to set load, cycle count and pass/fail criteria
ASTM F2357 fixes the method, not the acceptance limit. The limit comes from your product specification. Use this as a starting framework:
| Situation | Recommended load | Commonly used acceptance criterion* |
|---|---|---|
| Printed legends on keypads, housings, labels, lenses | 175 g | Minimum 40 cycles continuous, no worn-through area ≥ 0.1 mm × 0.2 mm (legacy RCA corporate spec) |
| Mobile phone / consumer electronics housing coating | 175 g | ≥ 300 cycles without breakthrough to substrate (widely used industry practice) |
| Painted plastic parts (spray) | 175 g | Inspect every 50 cycles; pass at spec cycle count with no colour change, no legend loss, no substrate show-through |
| Electroplated / PVD / hard-coat surfaces | 275 g | Spec cycle count, e.g. 300 cycles for plated plastic |
| Soft, low-durability surfaces: hot-stamp bright film, small fine print | 55 g | Test to failure to confirm placement and adhesion |
| Fine-resolution print | 175 g with 1/4" polyester tape | Test to failure, not to a pass/fail cycle number |
* These cycle counts are industry and OEM practices quoted in reliability specifications, not requirements of ASTM F2357 itself. Always state the applicable product specification on the test report.
275 g — hardest, most aggressive; hard coats, plating, anodised metal, and the configuration the vertical-shaft angle is factory-set for.
175 g — the standard default in ASTM F2357; most coatings, paints, printed legends.
55 g — gentle; soft coatings, hot-stamp foils, thin or small-area print where 175 g would destroy the layer too fast to discriminate.
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