You need to give more information.
Do you mean the tee shirt logo and the white colour ?
Usually when printing there is no white. The printer uses Cyan / Magenta / Yellow and K (Black) There is no white ink. Anything white takes the colour of the material. No need to make it transparent. Make your logo in Gimp. Send to the printing company.
That logo however is only 3 colours black, yellow and white.
My guess is it is screen-printed see: https://www.customplanet.co.uk/what-is-s...step-guide and the section 'What is the difference between screen printing and digital painting.
That logo would use the 3 'spot' colours and built up in 3 layers, one screen (stencil) per layer, and producing the screens is a whole different process.
Do you mean the tee shirt logo and the white colour ?
Usually when printing there is no white. The printer uses Cyan / Magenta / Yellow and K (Black) There is no white ink. Anything white takes the colour of the material. No need to make it transparent. Make your logo in Gimp. Send to the printing company.
That logo however is only 3 colours black, yellow and white.
My guess is it is screen-printed see: https://www.customplanet.co.uk/what-is-s...step-guide and the section 'What is the difference between screen printing and digital painting.
That logo would use the 3 'spot' colours and built up in 3 layers, one screen (stencil) per layer, and producing the screens is a whole different process.