I hope you can find the answer to your question in the following paper:

Locke, M.I.C.H.A.E.L. and Huie, P., 1983. The mystery of the unstained Golgi complex cisternae. Journal of Histochemistry & Cytochemistry, 31(8), pp.1019-1032.

Hello Aya Elgamal

Based on how the reagents act on a tissue to stain the organelles, they can be grouped into different categories. The most common grouping is whether the small molecule staining reagent binds to acidic or basic portions of the organelle. Hematoxylin and eosin (H&E staining) comes under the group of reagents that bind through an oxidation-reduction reaction and hydrogen bonding.

The Golgi apparatus is reluctant to take up most of the stains. Long back, in 1898 Camilo Golgi discovered Golgi apparatus by using a special silver staining technique that he developed, and which is today known as Golgi staining. Silver has the ability to precipitate metal salts onto specific structures within samples, which greatly differs from the methods that involve dyes.

Moreover, since the refractive index of Golgi apparatus is similar to that of cytosol, it is difficult to observe this organelle in the living cell with the light microscope. The use of silver staining method also called black reaction method can make this possible.

So, you may use the silver nitrate method to investigate the structure of Golgi apparatus. When the stained Golgi structure is examined under the microscope, you will observe the stained vesicles of the Golgi against the colorless backdrop.

Best.