css advice

hi

on enfold can i choose to turn off images for just one product category

my client site has two types of products. One are calendars to make a booking with an artist you can see this at
http://www.revivaltattoos.co.uk/product-category/artists-calendar/

I’ve appendede this quick css to ensure the image place holder doesn’t render on the calendar pages as it looks neater that way.
.single-product-main-image {display: none;}

But the issue is on the rest of the shop, such as the merchandise category you can see at
http://www.revivaltattoos.co.uk/product-category/revival-merchandise/

Has images and when you click into each on the image won’t show because of the css I added to hide the calendar images.

Is there a way to refine my css so it applies to just one product category type?