Using the imagery of comparing the colour of soot- a black powder to Tom's white hair, before it was shaved. Showing a duality, much like the themes and message of the poem.

Coffins of black- meaning the soot the child would be breathing in and could let to their deaths. Also, it could foreshadow the children's death as in the following two stanzas, angels. God and the setting of a funeral are mentioned.

https://sites.udel.edu/britlitwiki/chimney-sweeper/

A reference to Tom's innocence, using the word lamb and reference to his white hair. https://sites.udel.edu/britlitwiki/chimney-sweeper/

This first line is straightforward and starts a poem about child labourers within chimney sweepers around 1789 when the 'songs of innocence' where published, https://en.wikipedia.org/wiki/The_Chimney_Sweeper#:~:text='%20Blake%20uses%20this%20poem%20to,labor%20in%20a%20corrupt%20society.

The title of the poem is interpreted towards a more lighthearted and playful tone rather than serious tone.

'erring lace' in this context seems to be more towards the meaning of misbehaving manner rather than a wrong sense. Also adding a personification element to a piece of clothing- the lace.

The first two lines and the last two lines rhythm showing a formal element. Also 'Delight in Disorder' is a sonnet with 14 lines in total.