A former British National Party (BNP) candidate accused of plotting to make bombs had instruments covered in traces of chemical substances, a court heard.
Both men deny conspiracy to cause an explosion
Small amounts of nitrates, chlorine and ammonia were found on items at the Lancashire home of Robert Cottage, Manchester Crown Court heard.
The court has already heard how he was stockpiling explosive materials in anticipation of a UK civil war.
Mr Cottage, 49, and David Jackson, 62, deny conspiracy to cause an explosion.
Officers made the discovery when they searched Mr Cottage's home on Talbot Street, Colne, on 28 September 2006.
A red tub, green woollen gloves, a cardboard box, kitchen tongs with sponge taped to each end and a pipette all bearing chemical residues were recovered, the court heard.
A litre of hydrogen peroxide was also found at the house.
Explosives expert Sarah Wilson told the court she had examined the traces found on the tools.
Ms Wilson earlier explained how the ingredients found at Mr Cottage's home could have been used to make homemade explosives.
The court heard a document found in his home - the Anarchy Cookbook - detailed how to make a variety of anti-personnel bombs.
It also explained how to make "touch explosives", an unstable substance which would detonate when struck.
Under cross-examination by Alistair Webster QC, it emerged touch explosives could not injure and were mainly suitable for "schoolboy pranks".
Touch explosive was the only substance for which all the ingredients were present at the house.
Ms Wilson conceded that seven of the chemicals found were either pointless or unnecessary for explosives, and one was a dietary supplement.
Mr Webster said only the container of hydrogen peroxide had been opened, and this had several other household uses, including the sterilisation of false teeth.
Mr Cottage, a bus driver who failed to be elected as a BNP candidate in local elections, has admitted a charge of possession of explosives.
His co-defendant, dentist Mr Jackson, denies both charges.
The trial was adjourned until Thursday.