Full Idea
Secondary qualities are just ordinary properties - roughly, Locke's primary qualities - considered in the light of their effects on us.
Gist of Idea
Secondary qualities are just primary qualities considered in the light of their effect on us
Source
John Heil (From an Ontological Point of View [2003], 14.10)
Book Reference
Heil,John: 'From an Ontological Point of View' [OUP 2005], p.163
A Reaction
Unconvincing. If they only acquire their ontological status as primary qualities if they have to be considered in relation to something (us), then that is not a primary quality.