The phrase "about the same material" is correct and usable in written English.
It can be used when discussing items, topics, or subjects that are similar or related in content or substance.
Example: "The two articles are about the same material, focusing on the impact of climate change on agriculture."
Alternatives: "regarding similar content" or "concerning the same subject".
Elsewhere, a single-publication rule to prevent repeated claims against a publisher about the same material has been introduced.
By 2000 he had amicably left the HBO project, which continued in development without him, and begun researching a manuscript about the same material.
When one reads the long version, it's obvious what must go; if I had been doing the cutting I might have cut just about the same material.
But every artist has different thoughts about the same material.
I became impatient about covering the same material again.
Squirrels and crows use about the same materials for their nests, Dr. Barrowclough said.
"We were concerned about the repetition of the same material four times without audio, particularly as this was the first time this material was shown on UK television and no warning had been given beforehand," said Ofcom.
After microwave-assisted sintering, the samples showed uniform distribution of the cobalt ferrite phase in the PZT phase, with an average nanograin size of about 300 nm, while the same material sintered conventionally had an average cobalt ferrite grain size of about 6 µm.
Because we initially presented some form of "textiles" as a delivery option, some groups started talking about household items of the same material hanging in their houses curtains, cloth calendars, etc.
One minor distracting feature is that the introduction to most chapters tends to repeat the same material about Legionnaires' disease.
At the beginning of each week, Stephen A. Michlovitz, the district science supervisor, would review her plans, which she had to fit into the course syllabus approved by the Franklin Township School Board, covering the same material at about the same speed as the other teachers.
