Here's some definitions from Cake's list: Acid washing The quick definition can be summed up in one word, "horrible" LOL. Aka "Snow wash". This technique reared it head up in Italy in the late 80s. Basically you soak your pumice stones in bleach and tumble them with the jeans. Then neutralise. Stone washing French husband & wife team, Marithe & Francois Girbaud claim to have pioneered this technique of washing jeans in a machine with small pumice stones. Independently, the Japanese jeans company, Edwin also make this claim. The pumice stones are generally taken from southern Italy (the whitest and most expensive), Turkey and Indonesia (darkest and cheapest). Some claim that washing jeans with dark stones give the jeans a 'dirty' look, although this can be countered somewhat with extra rinsing in the laundry. Sandblasting As it sounds, compressed airguns shoot sand onto jeans to create abrasion. Sometimes a 'tracer' dye is added so that the 'shooter' can more accurately judge the volume and accuracy. Very fast, but quite a clumsy way to achieve fading. Microsanding Sanding is basically done 3 ways: Sandblasting, as above. Machine sanding - just like machines that you'd use to sand a wooden table. Handsanding aka Handbrushing - just a piece of folded fine sandpaper. All three methods are used in various ways, on the flat (tables, ironing boards), on the dummy (inflatable dummies, sometimes standing, sometimes flat, sometimes 'seated') and various templates can be used to create a 3D effect. Any sanding can be enhanced with chemical whiteners. Whiskering Also known as 'Cat's Whiskers'. These are the crease lines around the crotch. Industrially these can be done with laser, sandblasting, machine sanding, handsanding and abrasive rods. Same techniques are used for 'knee whiskers' (whiskers on the sides of knees) and 'honeycombs' (crease marks on the back of the knee). Overdye Basically dyeing over the fabric or jeans to add another tone of colour. Most often used is a 'yellowy' overdye to create a 'dirty' look. Also can be applied with spraygun or paintbrush for local colouring (ie. if you wanted just 'dirty knees').