Assertion: formaldehyde | /r/CapableOf | become perceptible
Facets:
value: clearly
type: MANNER
Source sentences:
text: This is the concentration that can be found to off-gas from many fabrics, but the value for any single item rarely exceeds 0.100ppm – above which point formaldehyde becomes more clearly perceptible.
text: It is not until someone becomes “sensitized” to formaldehyde to experience a set of very perceptible reactions and/or learns about formaldehyde and how to clearly recognize its presence, that formaldehyde becomes clearly perceptible even at a level of 0.050 mg/m3 or even lower.