CMYK, RGB, OMG

Mar 1, 2024 | cgk.ink writes:, color, design, print-on-demand, tech

CMYK and RGB printing: the 411

RGB and CMYK:

two methods, two results

RGB is best for websites and digital communications, while CMYK is better for print materials. Most design fields recognize RGB as the primary colors, while CMYK is a subtractive model of color.

RGB is an additive color model, while CMYK is subtractive. RGB uses white as a combination of all primary colors and black as the absence of light. CMYK, on the other hand, uses white as the natural color of the print background and black as a combination of colored inks. Graphic designers and print providers use the RGB color model for any type of media that transmits light, such as computer screens. RGB is ideal for digital media designs because these mediums emit color as red, green, or blue light.

With the RGB color model, pixels on a digital monitor are – if viewed with a magnifying glass – all one of three colors: red, green, or blue. The white light emitted through the screen blends the three colors on the eye’s retina to create a wide range of other perceived colors. With RGB, the more color beams the device emits, the closer the color gets to white. Not emitting any beams, however, leads to the color black. This is the opposite of how CYMK works.

CYMK is best for print materials because print mediums use colored inks for messaging. CMYK subtracts colors from natural white light and turns them into pigments or dyes. Printers then put these pigments onto paper in tiny cyan, magenta, yellow, and black dots – spread out or close together to create the desired colors. With CYMK, the more colored ink placed on a page, the closer the color gets to black. Subtracting cyan, magenta, yellow, and black inks create white – or the original color of the paper or background. RGB color values range from 0 to 255, while CMYK ranges from 0-100%.

Source: Boingo Graphics

print-on-demand: techniques

Feb 25, 2024 | cgk.ink writes:, print-on-demand, tech, technique

the different technologies used in creating print-on-demand products

Direct-to-Garment (DTG)

Direct-to-Garment printing (DTG) was developed as an inexpensive mass-production alternative to screen-printing. This method involves printing ink directly onto a treated garment – almost like a giant laser jet printer.

While DTG has appeal in regard to cost, color capabilities, & complexity of the designs it can print, it falls short in some of our other assessment categories. The versatility of the print method is lacking as prints are only successful on cotton garments – this leaves popular garments like hoodies, sweatshirts, & activewear either out of the catalog or looking a little lackluster. DTG prints also vary widely in consistency from one machine to the next, one garment to another, & among different color materials, which means your design may look perfectly accurate on a royal blue t-shirt but awful on a burgundy sweatshirt. This inconsistency leads to higher error rates & increased waste. While we love the look & feel of a DTG print, the longevity of that look & feel isn’t as impressive as some of the other print methods on this list.

Direct-to-Film (DTF)

Direct to film, commonly known as DTF, is a process in which a graphic printed onto a piece of film with various colored inks is applied to an apparel item. This pre-printed film is binded to the garment through heat and pressure from a heat-press machine. This creates a long-lasting and detailed graphic that can be placed on an array of garments.

DTF printing starts with the film being made on a DTF printer. This printer uses a thick PET film that ensures for better transferring characteristics. The ink used for these printers are in the typical CMYK (cyan, Magenta, Yellow & Black) pigment but also has the addition of white ink. The white ink plays a significant role in the creation of the DTF film as it is the foundation that the colored pigments get placed on.

Sublimation

You might remember the word “sublimation” from high school science class, but in POD, it’s a print method that uses heat & pressure to turn ink into gas & transfer it from paper onto another surface.

Overall, sublimation is an incredibly versatile print method, allowing for printing of both hard surfaces & porous materials. For printing garments, however, it’s limited to white polyester fabrics. In sublimation, the entire garment is printed, which means it’s better suited to edge-to-edge patterns than something like a graphic tee. While sublimation opens the door to incredible color and detail accuracy, it also has a higher error rate as the garment must be 100% flat for color to distribute evenly. When errors occur due to folds or elevated parts of the garment like seams, it often results in white unprinted areas on the final garment.

Vinyl

Decorating a garment with vinyl involves printing the design on heat transfer paper & using a combination of heat & pressure to transfer it onto a garment. Unlike sublimation, the print sits on top of the garment rather than being incorporated into the fibers.

Vinyl is an inexpensive alternative to screen printing for printing a smaller volume of garments. However, it’s quite time intensive per print as it involves manually trimming back the transfer paper, making it less than ideal for print on demand. Vinyl prints are also sensitive to heat & cannot be ironed without melting the print. While they’re able to capture more complex colors, vinyl prints are not conducive to small text or shapes with detailed edges as this requires excess vinyl to be manually pulled away from the detailed edges. Prints are also less durable & more prone to cracking as vinyl is heavy & inflexible.

Embroidery

Embroidery differs from the other decoration methods mentioned here, since it doesn’t really involve “printing” anything. Embroidery involves sewing a design into a garment with needle & thread – almost as old-school as it gets. In print-on-demand, it’s a little more technical. Your designs are converted into digital embroidery files that outline exactly where every stitch should be placed & what color thread should be used to do so. This file is then loaded onto an embroidery machine that places that design on a garment using as many spools of thread as are needed to create your design.

While it’s a great decoration method to use when embroidery is what’s desired, it’s quite a bit more expensive, restrictive, & time intensive than its other POD counterparts. Because your artwork needs to be digitized to be optimized for embroidery, it can take a bit longer for your products to be decorated than other decoration methods. Additionally, embroidery limits both design colors & design complexity – only a certain number of thread spool colors are available on each machine & a stitch can only be so small. This means you’ve got to be more conscious of the decoration method’s limitations when designing your clothing.

– Source(s): CustomCat.com

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