async.diff

diff --git a/Common/ImageProcessor.swift b/Common/ImageProcessor.swift
index 5afa17c..71d098f 100644
--- a/Common/ImageProcessor.swift
+++ b/Common/ImageProcessor.swift
@@ -23,9 +23,9 @@ class ImageProcessor {
         assetFetcher?.images(ofType: .originalImage, forItemID: item.id, completion: { (images) in
             var allFiltered: [UIImage] = []
             
+            self.processingQueue.async {
                 var filterIterator = item.filters.makeIterator()
                 for image in images {
-                
                     let colorFilter = ColorCorrectionManager.filterFor(tint: item.tint, andWarmth: item.warmth)
                     let colorCorrected = colorFilter.image(byFilteringImage: image)
                    
@@ -62,6 +62,7 @@ class ImageProcessor {
                 }
                 
                 self.makePrintImages(forItemID: item.id, usingImages: allFiltered, andAssetFetcher: assetFetcher)
+            }
             
             andThen?()
         })