To remove ink stains from ballistic nylon, start by blotting up as much of the ink as possible using a clean, dry cloth. Avoid rubbing the stain, as this can spread the ink further into the fabric. Next, apply a small amount of rubbing alcohol to a cotton swab or clean cloth and gently dab at the stain. The alcohol helps dissolve the ink, making it easier to lift off the surface. Continue blotting until no more ink transfers onto your cloth. If the stain persists, try using a specialized ink remover or a heavy-duty laundry detergent. Apply a small amount directly to the stain and let it sit for about 10 minutes before blotting again. For best results, test any cleaning solution on an inconspicuous area first to ensure it doesn't damage or discolor the fabric. Once the stain is removed, wash the item according to the care label instructions, ideally with cold water to prevent any residual ink from setting.

When comparing materials that best match leather in terms of durability, feel, and aesthetics, both vinyl and PVC are viable synthetic alternatives, but they cater to different needs. Vinyl, which is essentially a type of PVC that has been modified with additives to make it more flexible and suitable for upholstery, offers a closer mimic to leather's feel and appearance. It is also more comfortable against the skin, making it preferable for furniture, car seats, and clothing. PVC, while durable and waterproof, tends to be stiffer and less breathable, making it better suited for applications requiring higher durability and water resistance, such as outdoor furniture covers or waterproof bags. In terms of environmental impact, both materials raise concerns, but recent advancements in recycling technologies and the development of more eco-friendly additives have begun to address these issues. Ultimately, if you're looking for a material that is closer in texture and flexibility to genuine leather, vinyl would be the better match. However, for applications where durability and water resistance are paramount, PVC would be more suitable.

In Photoshop, changing pigment or color can be achieved through various methods, with the "Hue/Saturation" adjustment layer being among the easiest and most versatile. To use it, go to Layer > New Adjustment Layer > Hue/Saturation. This brings up a properties panel where you can slide the "Hue," "Saturation," and "Lightness" sliders until you achieve the desired color change. For more targeted adjustments, use the "Hand" tool in the properties panel to click on the specific color in the image you wish to change, then adjust. Another method is the "Color Replacement Tool" found in the toolbar which lets you paint over the desired area with a new color. Both methods allow significant control over color adjustments, making them suitable for a variety of tasks, from subtle corrections to dramatic shifts.