You can submit color files to us, and we will produce True Black and White prints. However, there are many methods to convert a color image to black and white yourself, and they offer a wide range of control over the look of the final image.
To produce a quality B&W print from a digital file that meets your expectations, the black and white image file should be submitted in the following specifications:
If you convert the file to grayscale in the process, please convert it back to RGB before submitting the file.
These only offer limited control over the tonal range of the final image.
These offer nearly unlimited control over your image. You can search the web for additional options under “Black & White Conversion” or “Black and White plugins”, etc.