Measured, documented, verified.
Test conditions, material compositions, and the controls that hold every batch to the same standard.
Write test specifications
Testing conditions for Obi / Obg and gel tips.
| Item | Obi / Obg | Gel |
|---|---|---|
| ISO standard | 12757-1 & 2 : 1998(E) | 14145-1 & 2 : 1998(E) |
| Write-test machine | HUTT HST10 | HUTT HST10 |
| Writing speed | 9.00 m/min | 4.50 m/min |
| Writing angle | 70° | 65° |
| Effective weight | 110 g | 80 g |
| Axial rotation | 11.00 m/rev | 6.75 m/rev |
| Paper | ISO 12757 | ISO 14145 |
| Paper speed | 50 mm/min | 50 mm/min |
| Temperature | 25°C to 27°C | 25°C to 27°C |
| Relative humidity | 50% to 60% | 50% to 60% |
Material composition
Ball and wire composition by element, across tip families.
Ball composition
Tungsten carbide balls — gel tips
- WC
- 90%
- Co
- 4.5%
- Cr
- 3%
- Others
- 2.5%
Tungsten carbide balls — obi / obg tips
- WC
- 93.5%
- Co
- 6.5%
Stainless steel balls — obi / obg tips
- Fe
- 82.18%
- Cr
- 14.00%
- Others
- 3.82%
Wire composition
Brass wire
- Cu
- 58%
- Pb
- 3%
- Others
- 39%
Nickel silver wire
- Cu
- 43%
- Ni
- 12%
- Mn
- 6%
- Others
- 39%
Stainless steel wire
- Cr
- 20%
- Others
- 80%
Quality control
Production runs on 100+ Swiss rotary transfer machines with raw materials sourced from Japan and Germany, under 100% camera inspection and ISO 9001:2015 certified protocols.
On-line inspection
The quantity, aesthetics, function, and size of every tip are measured and controlled during production.
Statistical sampling
Statistically meaningful volumes are selected and inspected at random intervals throughout production and dispatch.
Codified processes
In line with ISO requirements, current and historical batch records are documented and archived alongside full test data.
100% camera inspection
Automated camera inspection at every production and dispatch stage ensures defect-free batches leave our factories.