If you have the equipment to nuke it and you want more purple then go for it unclemac!
The good thing is that there are plenty of ketchup bottles out there, so nuking one won't do anything to impact colour diversity - that's the big controversy about it, that if everyone is taking their bottles and jars of varying colours and nuking them all deep purple, then we lose that diversity of colour, and the process is irreversible. If you had some super old or rare bottle it'd be a crime to nuke it, for sure, but this is okay.
I don't have anything against nuking bottles. I think that sometimes people can go a bit over the top with it, leaving them in the light for weeks, making these almost black-purple things, and always getting that same result. I suggest taking the bottle or jar out at the end of every day just to see how the colour is coming along, that way you can stop whenever you've arrived at the desired amount of purple. But heck, if you wanna go that dark, all the power to you, it does look awesome.
Actually you can nuke more modern bottles and jars as well. Many manufacturers started using selenium as an alternative to manganese, and when you nuke selenium glass you get different shades of brown, wheat, straw colours. It looks pretty cool.
