The file extension is used for Adobe Black and White settings of the image editing software Photoshop. Blw files contain information for converting a color image into a black and white image, including percentages of red, yellow, cyan, blue, and magenta, as well as values for saturation and hue.
BLW files are mostly used to convert digital photos into a black and white image. With the help of the settings, different presets (blw files) can be used to create completely different black and white images.
The window for the black / white function can be opened via 'Picture-> Adjustments-> Black-white'. Here you can load and save the settings. Photoshop already comes with some presets, including blue filter, maximum black or infrared, but without BLW files. The location of BLW files is usually 'Presets / Black and White' in the main Photoshop folder.
Most often resolving problems with opening BLW files is very simple. Just install an appropriate program that supports such files. All of the listed programs support BLW files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of BLW files or offer file conversion options, but may not be capable of editing such files.
It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate BLW files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the Adobe Photoshop applications is not on the list, select "Browse" option in order to manually locate the directory where Adobe Photoshop has been installed.
Sometimes problems with opening BLW files may not lie with the application itself, but can arise due to other causes, such as: