"Despite our appeals to the public, we have received limited information to help us identify her or her mum," said Detective Inspector Scott Beard this morning.
Police have now released images of items of clothing located in a blue plastic bag that was found during their scene examination at the recycling plant.
"The baby may have been in the blue bag, which also included several items of baby, children's and adult clothing," said Beard.
"The clothing includes a child's beanie, a distinctive pink child's sweater and pink T-shirt, women's belts and two women's tops and a sequined skirt that appears to have been cut up.
"There were also two baby onesies with colourful prints on them located in the area, which may have also come out of the bag."
Beard said while detectives can't fully determine whether the clothing is definitely linked to the mother of this baby, anyone who recognises the items is urged to contact police immediately.
"We are asking that if this clothing is known to you or you recognise who this clothing belongs to please contact us," he urged.
"This information will greatly help us with our enquiries.
"Not only do we want to identify the baby girl's mother to ensure her welfare and get her the medical assistance and support she needs, but we also want to get some answers for the sake of this little girl.
"She has no name and no one to mourn and bury her.
"The sooner police can identify her mother, the sooner this baby girl can be treated with the respect she deserves and laid to rest."
Can you help?
Anyone with information can contact the Operation Deer inquiry team 105 quoting file number 210816/2825 or Crimestoppers anonymously on 0800 555 111.