Changing Multichannel Mode to RGB without changing color

[Ilcéia]

I have this image to print on a T-shirt on a Sublimation printer and I need to change  it to the RBG mode, but when I do that on de menu  Image > Mode - the colors of the image change. How to do it without changing the colors of the image?

[Test Screen Name]

Multichannel is for working with the actual channels you print with, it isn’t an RGB adjustment layer. What are you trying to achieve, maybe there is another way. 

[Ilcéia]

The image is to be printed on  a sublimation printer. Usually these printers works on RGB.

That's why i need the change. Any ideia how do I do that, them?

[mjbelt]

https://helpx.adobe.com/photoshop/using/converting-color-modes.html

[PECourtejoie]

Hello, how does the image turn out? You have here an image with a white, Cyan, Magenta and Yellow layers, if I'm not mistaken usually, there is a black layer used to compensate for the ink purity (or lack thereof) and the outlines...

[Ilcéia]

Besides the channels I have a black background on the layers.

That is how the image turns when I change the image mode.

[silk-m]

Hi,

スマートオブジェクトで保存して、開き直すとRGBファイルになります。

現在旅先でPCを持っていないので、日本語のままで失礼します。

詳しい解説は金曜日になります。

[silk-m · Accepted solution]

Hi,

I'm sorry, but my previous answer was wrong.

1. This is a Multichannel file.

2. File / Open as Smart Object... "Ducky_MultiChannel.psd"

3. Multichannel file are open as RGB file.

4. Do Flatten Image. OK!

[Ilcéia]

Thanks, it worked.

[PECourtejoie]

Hello, move the two topmost channels to the bottom of the stack, then convert to RGB, it seems that multichannel assumes that the 3 topmost layers are CYM during the conversion to RGB.

[Ilcéia]

Thanks...It worked. The colors changed a bit because the black and the with base, the two channels moved down stoped working. But I can fix the lost workig on the layers.