Symphony Environmental Technologies said a review it had commissioned to investigate the scientific case for its biodegradable plastics technology had found it to be 'clear and compelling'.
The company had hired former deputy High Court judge Peter Susman QC, to conduct the review.
He concluded that oxo-biodegradable technology did facilitate the ultimate biodegradation of plastics in air or seawater by bacteria, fungi or algae, within a reasonable time.
He also said that criticism alleging that the technology would materially encourage littering as 'fanciful and unrealistic'.
In a statement, Susman said there was no longer tenable to conclude that there was 'no firm evidence either way' whether oxo-biodegradable plastic technology was effective.
'I consider that recent research provides clear and compelling evidence that oxo-biodegradable plastic is indeed effective in facilitating very significantly speedier degradation than is the case when that technology is not used,' he said.
At 1:55pm: (LON:SYM) Symphony Environmental Technologies PLC share price was +1.75p at 10.25p