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Inexpensive 3D Print Smoothing with the Touch Up

A new product from startup 3D Customization hopes to simplify the difficult process of smoothing ABS 3D prints with a new smoothing device: The Touch Up. 
The Touch Up uses the acetone process, which we feel can be dangerous if not done properly. Acetone is a colorless, highly flammable substance. The acetone smoothing process involves heating liquid acetone slightly until it vaporizes, then dipping your rough 3D print into a chamber holding the heavier-than-air hot vapor. The vapor is absorbed by the ABS, which softens and smooths the print. 
The problem has been that the flammability of acetone is notorious. It has a very low flash point and even as low as 2.5% mix with air can cause a flash fire. Even worse, acetone vapor can invisibly creep along a floor to reach an ignition source quite distant. For this reason we've been suspicious of using homemade acetone approaches for smoothing. 
That changes with the introduction of the Touch Up. It's an integrated glass vapor chamber and heating unit, which contains just the right amount of acetone for smoothing. In fact, if used properly, the Touch Up will have no acetone residue when a smoothing operation is complete. The Touch Up includes heating controls and indicators to indicate activity. 
Their Indiegogo launch campaign has started slowly, but we believe this could be one of the most inexpensive ways to vastly improve your personal 3D printing setup. The alternatives? Hugely laborious hand sanding or purchasing a USD$30K smoothing unit from Stratasys. For as little as USD$100, you can have a Touch Up beside your 3D printer. 

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