I greatly admire your efforts in this project... I wouldn't have half your tenacity nor patience
Not a fan of the tiny insulin syringes, too unwieldy for ink transfer; needle also looks a tad short.
Oh, be assured I've tested it, and the half-inch tubular needle will reach the very tip of the centrifuge tube. Actually, the tip of the 1ml syringe will almost reach, even without the needle; the external diameter of the syringe is narrower than the internal diameter of the centrifuge tube. I'm providing the needle primarily so that ink can be deposited into the cavity of a converter and, yes, I've tested the plastic blunt-tip needle shown in the photo with an international standard converter, and it can indeed reach inside the cavity.
If ever you pop into a Daiso take a peek in the cosmetics aisle, they sell very nice syringes with long fat blunt needles that are long enough to reach right into the bottom of short internationals. Syringes are 2.5ml or 20ml, they come in 3 colours of pink, yellow or blue - worth buying.
Worth buying for what purpose(s) specifically?
I have larger (3ml, 5ml, 10ml and 20ml) syringes, and a bunch of 1.5-inch metal tubular blunt-tip needles in different gauges here. Let's just say I have far more in number and variety than I'm going to need.
In the context of the ink samples giveaway(s), I fail to see the relevance or need to reach right into the bottom of short ink cartridges, since I'm not expressly offering either a way to flush cartridges clean with pressurised jets of water, or transferring ink out of short ink cartridges; I'm only providing a tool that will draw every last drop from the centrifuge tube in which I've supplied an ink sample, and can then be used to deposit the ink into a variety of fountain pen ink reservoirs, e.g. past the 'lip' into the space inside the widest part of the hollow tube on a converter.
Those squeezy pipettes are great too, exactly what I use for topping up carts. But one squeeze of the bulb only collects about 0.2ml, too messy to squeeze a 2nd time so usually takes 4-5 trips from bottle to cart I get better control from filling just the stem not the bulb, so that's even less effective volume.
The pipettes I have are graded as 0.5ml, and while they aren't the best made or calibrated instruments, when I tested one earlier tonight, the stem (up to the high mark, near the bulb) easily holds more than 0.4ml. Given that I'm only offering ink samples of ~0.75ml each, it shouldn't take more than two transfers with the pipette to empty the centrifuge tube's contents.
However, that would unreasonably increase the cost to the person giving them away.
- The cost of posting a large letter < 50g to North America by Economy Air = A$3.20
- The cost of posting a large letter > 50g and < 125g to North America by Economy Air = A$8.30
- The cost of posting a small parcel > 20mm in depth (or its narrowest dimension) and < 50g to North America by Economy Air = A$16.00
So I can't see any reason for giving away and including in the packages larger syringes or pipettes that grossly exceed the volume of ink in a sample. There aren't any 1ml plastic pipettes I could find, and in any case I have my doubts as to whether the tips on such (if they're available to buy) would fit inside the mouth of an international standard cartridge/converter, when the 0.5ml pipettes only just make it with roughly 0.1mm leeway.
Edited by A Smug Dill, 11 November 2019 - 00:27.
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