Capsule Stain
The classification of cyanobacteria is based on Gram staining, which is typically negative.
The acid-fast staining result for the sample is positive.
Because the cell wall repels the binding of the negative stain therefore the cells do not stain. Because of this the background is stain with the dye used and the bacteria remain colorless. Basically your staining the background, that is, you are not directly staining the cells.
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The classification of cyanobacteria is based on Gram staining, which is typically negative.
size and shape
The acid-fast staining result for the sample is positive.
Because it is a Gram-negative bacterium and can be stained with Gram-negative stain.
Bacteria .
Because the cell wall repels the binding of the negative stain therefore the cells do not stain. Because of this the background is stain with the dye used and the bacteria remain colorless. Basically your staining the background, that is, you are not directly staining the cells.
A negative stain is a type of staining technique used in microbiology where the background surrounding the specimen is stained dark, leaving the specimen colorless and transparent. This method is particularly useful for visualizing certain microbial structures that may be difficult to see using other staining techniques.
Those which show pink colour in gram staining are gram negative bacterialike E.coli
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safranin
Gram Negative
Gram negative bacteria are typically rod-shaped (bacilli) or corkscrew-shaped (spirochetes). They have a double cell membrane composed of an inner and outer membrane, which contributes to their staining properties in the Gram staining technique.