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The complete solution for measuring apparent density, bulk factor, and pourability of plastic materials — fully compliant with ASTM D1895 Methods A, B & C.
Engineered for ASTM compliance, built for laboratory reliability.
Every dimensional detail — cup volumes, funnel diameters, funnel-to-cup clearance, plunger weight — is manufactured to match ASTM D1895 requirements exactly. No approximations.
From ultra-fine vinyl resin powders (Method A) to coarse pellets and dice (Method B) and large flakes, chips, and cut fibers (Method C) — one product series handles every material form.
AT303E (Method A) is equivalent to ISO R60. AT303G (Method C) is identical to ISO R61. Ideal for laboratories working to both standards simultaneously.
Based on ASTM D1895's six-laboratory round-robin study, within-lab Vᵣ values range from 0.11% to 0.77%. The AT303 Series is designed to perform within these published precision bands.
Apparent density, bulk factor, and pourability — all defined under ASTM D1895 and all measurable with the AT303 Series. Simplify your laboratory equipment procurement.
Manufactured by Anytester (Hefei) Co., Ltd., a specialist testing instrument company based in Hefei, China, providing full QC documentation and technical support with every unit.
Select the model that matches your material form and ASTM D1895 test method.
For Fine Powders & Free-Flowing Granules
AT303E covers the measurement of apparent density for fine granules and powders that pour readily through a small funnel. The 100 cm³ measuring cup with 9.5 mm funnel is dimensionally identical to ASTM D1895 Method A apparatus. This model is also equivalent to ISO Method R60, making it suitable for global certification workflows.
Note: For materials with electrostatic charge (e.g., carbon black compounds), premixing 0.05–0.2 wt% carbon black is recommended per ASTM D1895 to reduce density variability.
| Parameter | Value |
|---|---|
| Test Method | ASTM D1895 Method A |
| ISO Equivalent | ISO R60 |
| Measuring Cup Volume | 100 ± 0.5 cm³ |
| Cup Inner Diameter | 39.9 mm (1.572 in.) |
| Cup Inner Height | 79.8 mm (3.144 in.) |
| Sample Quantity | 110–120 mL (115 ± 5 cm³) |
| Funnel Lower Mouth Dia. | 9.5 mm |
| Funnel Height | 114 mm |
| Funnel–Cup Distance | 38 mm (1.5 in.) |
| Result Precision | Average of 1 determination |
For Coarse Granules, Pellets & Dice
AT303F is designed for coarse, granular plastic materials — including pellets and dice — that either cannot be poured or pour with difficulty through the narrow funnel of Method A. The 400 cm³ measuring cup and 25.4 mm wide funnel ensure consistent filling of larger-particle materials. Three determinations are averaged per sample as required by the standard.
Note: For finely divided powders such as vinyl resins that may bridge in the 400 cm³ cup, the 100 cm³ cup from AT303E may be substituted with a reduced sample size (115 ± 5 cm³), per ASTM D1895 Note 5.
| Parameter | Value |
|---|---|
| Test Method | ASTM D1895 Method B |
| Measuring Cup Volume | 400 ± 0.5 cm³ |
| Cup Height | 240 ± 10 mm |
| Sample Quantity | 500 ± 20 cm³ |
| Funnel Lower Mouth Dia. | 25.4 mm (1.0 in.) |
| Funnel Height | 230 mm |
| Result Precision | Average of 3 determinations |
| Calculation | Weight (g) per cm³ of cup volume |
For Flakes, Chips, Cut Fibers & Strands
AT303G addresses the most challenging plastic material forms — coarse flakes, chips, cut fibers, and strands that cannot pass through any funnel. A 1000 cm³ measuring cylinder combined with a calibrated weight plunger (2300 ± 20 g) yields both pre-load and post-load apparent density values, enabling accurate bulk factor calculation for highly compressible materials. This method is identical to ISO R61.
Unique output: Provides both H₁ (before load) and H₂ (after load) heights, enabling calculation of density and bulk factor at two compression states — critical for hopper design in fibrous material processing.
| Parameter | Value |
|---|---|
| Test Method | ASTM D1895 Method C |
| ISO Equivalent | ISO R61 |
| Measuring Cylinder Volume | 1000 ± 0.5 cm³ |
| Cylinder Cross-Section | 61.89 cm² |
| Sample Weight | 60 ± 0.2 g |
| Plunger Total Weight | 2300 ± 20 g (5.07 ± 0.04 lb) |
| Settlement Time | 1 minute before reading |
| Height Resolution | 0.1 cm |
| Result Precision | Average of 3 determinations |
Three key material properties — one internationally recognized standard.
The weight per unit volume of a material, including the voids inherent in the material as tested. Also referred to as "bulk density" for molding powders. A direct indicator of material fluffiness and packing efficiency — critical for packaging design and volumetric dosing systems.
The ratio of volume before molding to volume after molding — equivalently, the ratio of molded density to apparent density. A dimensionless value that quantifies the volume change during fabrication. Essential for mold cavity sizing, shot weight calculation, and hopper feed-rate optimization.
A time-based flow measurement — the seconds required for a standard sample to flow through the Method A funnel. Characterizes how uniformly a fine powder flows through hoppers and feed tubes. Measured with the same funnel as Method A, together with a stopwatch. Reported to the nearest 0.2 s.
Set up funnel at specified height above measuring cup per ASTM D1895 Fig. 1 or Fig. 2.
Close funnel bottom; pour sample volume (115 ± 5 cm³ or 500 ± 20 cm³) into funnel.
Open funnel quickly; allow material to flow freely into measuring cup without vibration.
Scrape excess level with a straight edge; weigh cup contents to nearest 0.1 g.
Calculate apparent density (g/cm³); average three determinations (Method B).
The AT303 Series serves quality control and R&D labs across a broad range of plastics-related industries.
| Industry | Typical Materials | Recommended Model | Test Purpose |
|---|---|---|---|
| Plastics Compounding | PP, PE, PVC granules | AT303F | Batch-to-batch density consistency |
| Injection Molding | Nylon, POM, PET pellets | AT303F | Shot-weight & mold fill optimization |
| Film & Fiber Production | PET chips, cut glass fibers | AT303G | Bulk factor for hopper & feed design |
| Resin Manufacturing | Vinyl resins, fine PE/PP powders | AT303E | Pourability & hopper flow verification |
| Automotive Composites | Glass-filled PA6, PP compounds | AT303F / AT303G | Compound density & compression ratio |
| Packaging Materials | LDPE, HDPE powders | AT303E | Processing parameter control |
| Recycled Plastics | Regrind flakes, crushed PET | AT303G | Pre-processing density assessment |
| QC & Certification Labs | Mixed plastic forms | Full Series | ASTM D1895 & ISO R60/R61 reporting |
Choose the right AT303 model for your material and test requirement.
| Specification | AT303E | AT303F | AT303G |
|---|---|---|---|
| ASTM D1895 Method | Method A | Method B | Method C |
| ISO Equivalent | ISO R60 | — | ISO R61 |
| Measuring Volume | 100 ± 0.5 cm³ | 400 ± 0.5 cm³ | 1000 ± 0.5 cm³ |
| Funnel Lower Dia. | 9.5 mm | 25.4 mm | N/A (plunger method) |
| Funnel Height | 114 mm | 230 mm | N/A |
| Funnel–Cup Distance | 38 mm | — | N/A |
| Weight Plunger | No | No | 2300 ± 20 g |
| Material Form | Fine powders, free-flow granules | Coarse pellets, dice | Flakes, fibers, strands |
| Measures Pourability | [YES] | Limited | [NO] |
| Pre & Post-Load Density | No | No | [YES] H1 & H2 |
| Typical Sample | 115 ± 5 cm³ | 500 ± 20 cm³ | 60 ± 0.2 g |
Data from ASTM D1895's official six-laboratory round-robin study.
ASTM D1895 includes an extensive precision and bias dataset derived from a 1987–88 interlaboratory study involving six laboratories and eight commercial plastic materials, covering polypropylene, cellulose acetate, polyethylene, nylon, polyacetal, PVDC, PVC, and polyester (PET).
Within-laboratory relative standard deviation (Vᵣ) values ranged from 0.11% to 0.77%, while between-laboratory values (V_R) ranged from 1.83% to 5.14% — confirming that the methodology delivers excellent reproducibility when the specified apparatus dimensions are followed precisely.
The AT303 Series reproduces the exact apparatus dimensions specified in ASTM D1895, ensuring that your laboratory data is directly comparable to published interlaboratory benchmarks and defensible in supplier qualification audits.
Reference: ASTM D 1895–96, Table 1 — Precision and Bias Data (Supporting data: RR:D20-1161)
| Material | Avg. Density (g/cm³) | Within-Lab Vᵣ (%) | Between-Lab V_R (%) |
|---|---|---|---|
| Polypropylene (A) | 0.5372 | 0.43 | 4.77 |
| Cellulose Acetate (B) | 0.7342 | 0.35 | 5.14 |
| Polyethylene (C) | 0.6191 | 0.42 | 3.71 |
| Nylon/Polyamide (D) | 0.7314 | 0.39 | 4.67 |
| Polyacetal (E) | 0.8766 | 0.62 | 3.44 |
| PVDC (F) | 0.7819 | 0.11 | 2.11 |
| PVC (G) | 0.6092 | 0.30 | 1.83 |
| Polyester/PET (H) | 0.7975 | 0.77 | 4.39 |
Every AT303 Series unit ships complete and ready for immediate use.
Contact Anytester today for pricing, datasheets, and technical support on the AT303 ASTM Series.