White vinyl backdrop

[MissyG]

Hello, I need to see if you can help me. I currently have a white vinyl backdrop that i use for my studio. Studio is located in my basement with no windows. I have a set of vflats that I use to add light as well as ocf with a 42" umbrella using triggers. I also use a reflector. 

My question is this, what is the best way to make the backdrop nice and white without making the photo look fake and having to spend hours on the photos. 

I tried last night and was really happy with my edit and wrote the steps down but when I brought the next photo up and tried the same steps it didn't work and looked bad. 

Please help as I am really frustrated right now and need to get this session completed 

[Christina Keddie]

We'll need to see a sampling of the photos you're working on.   Thanks!